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キョウ Kyō
"The Poisonous Ninja Master"
Lets Go Pikachu Eevee Koga.png
Art from Let's Go, Pikachu! and Let's Go, Eevee!
Gender Male
Eye color Black
Hair color Greying teal
Hometown Fuchsia City
Region Kanto
Relatives Janine (daughter)
Aya (anime only, sister)
Trainer class Gym LeaderRBYFRLGPE
Generation I, II, III, IV, VII
Games Red, Blue, Yellow, Gold, Silver, Crystal, FireRed, LeafGreen, HeartGold, SoulSilver, Let's Go, Pikachu!, Let's Go, Eevee!, Stadium, Stadium 2, Masters
Leader of Fuchsia Gym
Badge Soul Badge
Elite Four of Indigo Plateau
Specializes in Poison types
English voice actor Christopher Bevins (Masters)
Japanese voice actor N/A (Masters)
Anime debut The Ninja Poké-Showdown
English voice actor Stuart Zagnit
Japanese voice actor Hōchū Ōtsuka

Koga (Japanese: キョウ Kyō) was the Leader of Fuchsia City's Gym. He is a student of ninjutsu who specializes in Poison-type Pokémon. He handed out the Soul Badge to Trainers who defeated him.

He became a member of the Indigo Elite Four some time after the events of Generation I and its remakes, but before the events of Generation II and its remakes, thus leaving his daughter Janine in charge of the Fuchsia Gym.


In the core series games

Koga, known as the Poisonous Ninja Master, serves two roles in the Pokémon games. In Pokémon Red, Blue, Yellow, FireRed, and LeafGreen and Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, he is the Leader of the Fuchsia Gym, but is promoted to a member of the Indigo Plateau Elite Four in Pokémon Gold, Silver, Crystal, HeartGold, and SoulSilver. Koga is a user of the Poison-type; he likes the despair and horror that Poison-type Pokémon can inflict on others.

Koga has studied medicine and antidotes; he makes his own potions to heal his Pokémon. He also serves as a teacher. Many students come to him to be trained in the arts of Ninjutsu and Pokémon. One of his students is his own daughter, Janine, who takes over his Gym in Generations II and IV storyline. In addition to these roles, Koga also patrols the grounds of the Kanto Safari Zone, to ensure that the players of the Safari Game are safe from the wild Pokémon within.

In Generations I, III, and VII, Koga's Gym is typically the fifth Gym to be challenged. He has built invisible walls in the Fuchsia City Gym, constructing a confusing maze out of them. Koga awaits challengers in the center of the maze, clearly visible, but a group of Koga's students must be fought first. Defeating him will earn the successful Trainer the TM for Toxic and the Soul Badge.

With the future of the Gym in his daughter's hands, Koga advances to a role in the Pokémon League of Kanto and Johto before the events of Generations II and IV. In these games, he is the second member of the Elite Four to be faced. The team he uses in this role is similar to his Gym Leader's teams; the main difference is the introduction of Pokémon not native to Kanto. Koga's battle style as an Elite Four member is designed to confound and destroy his opponent in battle. Rather than using brute force, Koga attempts to confuse, put to sleep, and poison his opponent.

He speaks with a Japanese accent, as evidenced in Pokémon Masters.

Fame Checker

This is a list of the Fame Checker's information on Koga in Pokémon FireRed and LeafGreen Versions.

Fuchsia City - Sign
  • What does this person do?
"Fuchsia City Pokémon Gym
Leader: Koga
The Poisonous Ninja Master"
Fuchsia Gym - Koga
  • Favorite kind of Pokémon?
"Despair to the creeping horror of Poison-type Pokémon!"
Fuchsia Gym - Juggler Kirk
  • What is this person like?
"Even though I've lost, I will keep training according to the teachings of Koga, my ninja master."
Fuchsia City - Charine
  • Family and friends?
"My father is the Gym Leader of this town.
I’m training to use Poison Pokémon as well as my father."
Safari Warden's Home - Pokémon Journal
  • There’s a rumor...
"Koga is said to have a thorough knowledge of medicine.
He even concocts medicine to nurse his Pokémon to health."
Safari Zone - Man
  • What does this person do?
"The Safari Zone's huge, wouldn't you say?
Fuchsia's Gym Leader, Koga, patrols the grounds every so often.
Thanks to him, we can play here knowing that we're safe."
Message from Koga
  • From: Koga
  • To: [Player]
"You and I, we must both set our sights higher and work towards meeting our challenges.
Now, I must go train my daughter."


This is a listing of Koga's Pokémon in the games in which he has appeared.

Pokémon Red and Blue

Pokémon Yellow

Pokémon Gold, Silver, and Crystal

Pokémon FireRed and LeafGreen

Pokémon HeartGold and SoulSilver

First battle


Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!

Gym battle



Pokémon Red, Blue, and Yellow

  • Before battle
"Fwahahaha! A mere child like you dares to challenge me? Very well, I shall show you true terror as a ninja master! You shall feel the despair of poison and sleep techniques!"
  • Being defeated
"Humph! You have proven your worth! Here! Take the SoulBadge!"
  • After being defeated
"Now that you have the SoulBadge, the Defense of your Pokémon increases! It also lets you Surf outside of battle! Ah! Take this too!"
"TM06 contains Toxic! It is a secret technique over 400 years old!"
"When afflicted by Toxic, Pokémon suffer more and more as battle progresses! It will surely terrorize foes!"

Pokémon Gold, Silver, and Crystal

  • Before battle
"Fwahahahaha! I am Koga of the Elite Four. I live in shadows, a ninja! My intricate style will confound and destroy you! Confusion, sleep, poison... Prepare to be the victim of my sinister technique! Fwahahahaha! Pokémon is not merely about brute force--you shall see soon enough!"
  • Being defeated
"Ah! You have proven your worth!"
  • After being defeated
"I subjected you to everything I could muster. But my efforts failed. I must hone my skills. Go on to the next room, and put your abilities to test!"

Pokémon FireRed and LeafGreen

  • Before battle
"Fwahahaha! A mere child like you dares to challenge me? The very idea makes me shiver with mirth! Very well, I shall show you true terror as a ninja master! Poison brings steady doom. Sleep renders foes helpless. Despair to the creeping horror of Poison-type Pokémon!"
  • Being defeated
"Humph! You have proven your worth! Here! Take the SoulBadge!"
  • After being defeated
"Now that you have the SoulBadge, the Defense of your Pokémon rises. It also lets you Surf outside of battle. Ah! Take this, too!"
"Sealed within that TM lies Toxic! It is a secret technique dating back some four hundred years."
"When afflicted by Toxic, a Pokémon suffers more and more. It suffers worsening damage as the battle wears on! It will surely terrorize foes!"

Pokémon HeartGold and SoulSilver

  • Before battle
"Fwahahahaha! I am Koga of the Elite Four. I live in shadows--a ninja! My intricate style will confound and destroy you! Confusion, sleep, poison... Prepare to be the victim of my sinister techniques! Fwahahahaha! Pokémon are not merely about brute force--you shall see soon enough!"
  • After sending out last Pokémon
"One Pokémon left? Ha ha ha! I've been counting on this one from the very beginning!"
  • When last Pokémon is at critical health
  • Being defeated
"Ah! You've proven your worth!"
  • After being defeated
"I subjected you to everything I could muster. But my efforts failed. I must hone my skills. Go on to the next room, and put your abilities to the test!"

Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!

Fuchsia Gym
"Yo! Champ in the making! We have the Safari Zone here in Fuchsia City, where you can meet tons of different Pokémon! And at the Fuchsia City Gym, we welcome Trainers who've met lots of Pokémon, so... I'll need to see if you’ve managed to catch at least 50 species of Pokémon! ..."
  • If the player hasn't caught enough Pokémon
"You've caught... <number of caught Pokémon> species! Unfortunately, you haven't made it to 50 species yet... Go catch some more Pokémon and then come back! The Fuchsia City Gym is always open!"
  • If the player has caught enough Pokémon
"Well done! Looks like you've caught <number of caught Pokémon> species! That means you are now worthy of challenging my Gym! ..."
  • After qualifying to challenge the Gym
"Fwahahahaha! Startled by my disguise, are you? I shall use my intricate style to confound and destroy you in battle, as well!"
  • Before battle
"Fwahahaha! A mere child like you dares to challenge me? That very idea makes me shiver with mirth! Very well, I shall show you true terror as a ninja master! Opponents can't lay a hand on me, as poison brings their steady doom. Despair as you feel the creeping horror of Poison-type Pokémon!"
  • Being defeated
"Hmph! You have proven your worth!"
  • After being defeated
"Here! Take a Soul Badge!"
"Now that you have a Soul Badge, Pokémon up to Lv. 60 will heed your command if you received them in a trade. Ah! Take this, too."
"Sealed within that TM27 lies the move Toxic! It is an ancient move, passed down through my family for 400 years. When hit with Toxic's poisonous effects, a Pokémon will take more and more damage with each turn that passes in battle! It will surely terrorize your opponent!"
  • Before battle (first rematch)
"Fwahahaha! If it isn't the child. It seems we are fated to meet once again. You have come at a truly opportune time. I was just thinking that I wanted to test my newly refined sinister techniques... in a battle that will end in your utter defeat!"
  • Before battle (subsequent rematches)
"Fwahahaha! Today I'll not only defeat you, but I will also demonstrate my fatherly dignity to my daughter!"
  • Being defeated
"...If I am not strong enough to defeat you now, there is but one thing to do. I must hone my skills."
  • After being defeated
"With Trainers like you and <rival>, the Pokémon League must be a place of formidable strength! Truly, it is something to be proud of! As it so happens, I have been thinking of aiming to join the Elite Four myself..."

In the side series games

Pokémon Stadium

Round 1

Round 2

Pokémon Stadium 2

Round 1

Round 2


  • Before battle
"Ah, so it is you who defeated Will? Interesting..."
"Would you care for a glimpse into the world of the ninja?"
"Your arrival is indeed impressive, as is your look of resolve."
  • Sending out first Pokémon
"<Pokémon>! How's that?"
  • Sending out a new Pokémon
"<Pokémon> will take you on."
"I pity you, but here's <Pokémon>!"
"There, <Pokémon>!"
"It can't be easy with <Pokémon>."
"This can't be helped!"
"Well done, <Pokémon>!"
  • Own Pokémon faints
"This cannot be!"
"Ah... You've done well."
"That critical hit was by mere chance! It was nothing!"
  • Player's Pokémon lands a critical hit
"Landing a critical hit is merely a fluke, that's all!"
  • Successfully poisoning the player's Pokémon
"How do you like that?"
  • Successfully confusing the player's Pokémon
"Wah, ha, ha... That was fine."
"So? What good is this?"
"The ninja technique of Double Team!"
  • Commanding his Pokémon to use Toxic
"Savor it! Toxic!"
"How about this?"
  • If the player is defeated
"You have lost."
  • After being defeated
"It stands to reason that you defeated Will!"
"I, too, must pursue further discipline."
"Never have I met the likes of you."
  • After winning
"You expect to battle the Elite Four with your current skills?"
"Have you learned to fear the techniques of the ninja?"
"You lack disciplined training!"
  • If the battle ended in a draw
"Hmm... You don't appear to be a raw amateur after all."
  • If the player runs from the battle
"It would be better for you to try at another time."

Pokémon Puzzle Challenge


050Diglett.png This section is incomplete.
Please feel free to edit this section to add missing information and complete it.
Reason: Quotes seem to vary, perhaps depending on how well the player did..
  • Normal
"Ha, ha, ha! My skill will be hard to overcome! Let me show you what I mean!"
"You have done well. I must devote myself to my training. Test your skills against the others."
  • Hard
"Ha, ha, ha! My skill will be hard to overcome! Now you shall see my mystic puzzle powers!"
"You have done well. If I cannot match you now, I can only train further. Continue testing your skill!"
  • Super Hard
"Ha, ha, ha! My skill will be hard to overcome! Now you shall see my mystic puzzle powers!"
"You have done well. If I cannot match you now, I can only train further. Continue testing your skill!"
  • Intense
"Ha, ha, ha! My skill will be hard to overcome! Now you shall see my mystic puzzle powers!"
"You have done well! Continue testing your skill!"

Pokémon Puzzle League


  • Before battle
"Greetings, young warrior. I am Koga, the Pokémon sensei who holds the Soul Badge. If you wish to best me, it will take great patience and agility. Do you choose to battle me?"

Pokémon Zany Cards

Koga in Pokémon Zany Cards

Koga appears, along with Sabrina, as the Stage 4 opponent of Special Seven mode.


  • Before battle
"Ha ha ha! I am Koga! Ninja of Fuchsia Gym. I wield sleep, confuse, and more spells! Feel my power in battle!"
  • During battle
  • Using a card
"I can't be confused."
"Take this spell!"
"Ninja-style is the best!"
"I'm sticking with it."
  • Drawing a card
"Drawing more is my plan."
"This is not good..."
  • Hit
"It's ok. More spells."
  • Hit with Reverse
"Can't escape from me."
  • After battle
  • Second or third
  • When defeated
"Well done! Super!"

Pokémon Masters

Sync pairs

Sync Dex Trainer NDex Pokémon Move Type(s) Weakness Role Passive Skill(s) Base Potential Availability
#62 Koga #169 MastersIcon169.png Crobat
PoisonIC Masters.png
ElectricIC Masters.png
Masters Tech.png Haste ★★★★ Story
Chapter 16


Menu interface (voice clips)
  • Sync pair viewer
"You shall feel the despair of poison!"
"Pokémon battling is not merely about brute force. You shall see soon enough."
  • Selection screen (forming team)
"I would be honored to accompany."
  • Upon learning a new move
"Oh! A new move!"
  • Upon leveling-up
"Ah, a satisfactory outcome."
  • Upon reaching max level
"Witness a true ninja master!"
  • Upon unlocking a new level cap
"There is no limit to my ninja techniques."
  • During conversation
"A moment."
"Are you ready?"
  • During conversation
"Here, take this."
Battle interface (voice clips)
  • Co-op match screen
  • VS screen
"Wahaha! Prepare yourselves!"
  • Battle start
  • Using Pokémon move
"Take this!"
  • Using item
  • Using Sync Move
"Let's see how you like this."
  • Unity Move
  • Uh-oh!
"Let's see how you like this."
  • Switching in
  • Recalling fainted Pokémon
"I did not expect retreat."
  • "Nice" emote
  • "Watch out" emote
"I sense danger!"
  • "Let's do this" emote
"My intricate style will confound and destroy you."
  • "Thanks" emote
"You have my thanks."
  • Victory
"That is the true power of ninja techniques!"
Main Story Chapter 23 - Hearts Connected by Fashion
  • The Maiden from a Land with History
"Well, we met some kid Trainers on the way here."
"It's...difficult to describe exactly, but..."
"This garb has been passed down from ninja to ninja for generations. To hear such disrespect for it is..."
"What business do you have with us?"
"Our clothes are..."
"Fwahahaha! I'd expect nothing less from a designer!"
  • To Be a Pokémon
"Hmm. It seems Valerie's reputation precedes her."
"I see... I was thinking of getting an outfit for my daughter, but...if they cost that much..."
"I...I see!"
"Anything is fine, from being shown around town to having a Pokémon battle. Anything you want."
"You...want to be a...Pokémon?"
"Hmm. So you weren't speaking metaphorically. I think you might've heard some bad information."
"...I'm sorry, Valerie, but you can't become a Pokémon by using a sync stone."
  • A Fellow Fashionista?
"Having a dream is fine, but that's no reason to go forcing people to do things."
"I'll show you to where the map leads. Please follow closely."
  • Leaf's Idea
"It certainly seems like that would be the case..."
  • The Stage Awaits
"Fwahaha! Glad to hear it, Valerie!"
"Fwahahaha! It seems we've gained yet another strong-willed ally."
"We welcome you with open arms! Isn't that right, <player>?"
Pokémon Center
  • Random conversation
"I was originally a Gym Leader, and I made an invisible labyrinth in my Gym."
"Of course, it was to weed out weak Trainers!"
"But my daughter got lost in there once and created quite a scene."
"She has since grown to be my successor and a fine ninja as well as a Gym Leader, but..."
"No matter how old she may become, she is still my child. That story will always bring a smile to my face."
  • If spoken to again
"My daughter looks up to me. Maybe it's because of this that she is showing very fast growth!"
"I must train twice as hard to make sure that I am not overtaken by the girl."
  • Random conversation
"If you're going to be battling all sorts of pairs, make sure you choose the type of moves that your opponents are weak against."
"Fwahaha! As long as you can find your opponent's weakness, you'll have an edge in any Pokémon battle!"
"If you know not only what the opposing Pokémon are weak to but also what yours are weak to..."
"you will be able to identify both opportunities and crises!"
  • If spoken to again
"Now that I've warned you to look out for your opponent's weaknesses, you understand what that means, yes?"
"It means that I challenge you!"
"I am intrigued to see how you will deal with my Pokémon and my techniques!"
  • Random conversation
"Venomoth, a Pokémon that inhabits the Kanto region, looks very beautiful."
"However, behind that beauty, it hides a deadly poison."
"Beautiful things often hide their share of danger. Remember that for the future."
  • If spoken to again
"Fwahaha! A long time ago, I was hit by Venomoth's poison."
"But it was through that experience that I became interested in Poison-type Pokémon. It was through that I became the man in front of you!"
  • Random conversation
"You have become much stronger than when we first met!"
"Your desire to improve is splendid! I truly want you as an apprentice!"
"I enjoy watching your remarkable growth!"
  • If spoken to again
"Even one that has lived on a single track as a ninja and a Pokémon Trainer has something to learn from your Pokémon handling."
"I wonder, if I introduced you to my training and teachings, would you become even stronger?"
"Fwahaha! No, I will not force you. But if you are ever interested, come talk to me!"


Sugimorikogaoriginal.png Red Blue Koga.png FireRed LeafGreen Koga.png HeartGold SoulSilver Koga.png
Headshot from
Red and Blue
Official artwork from
Official artwork from
FireRed and LeafGreen
Official artwork from
HeartGold and SoulSilver


In the core series

050Diglett.png This section is incomplete.
Please feel free to edit this section to add missing information and complete it.
Reason: Missing overworld model from LGPE.
Spr RG Koga.png Spr Y Koga.png Spr GS Koga.png Spr FRLG Koga.png Spr HGSS Koga.png VSKoga.png VSKoga PE.png
Sprite from
Red and Blue
Sprite from
Sprite from
Generation II
Sprite from
FireRed and LeafGreen
Sprite from
HeartGold and SoulSilver
VS sprite from
HeartGold and SoulSilver
VS model from
Let's Go, Pikachu! and Let's Go, Eevee!
Koga I OD.png Koga Y OD.png Koga II OD.png Koga III OD.png Koga OD.png
Overworld sprite from
Red and Blue
Overworld sprite from
Overworld sprite from
Generation II
Overworld sprite from
FireRed and LeafGreen
Overworld sprite from
HeartGold and SoulSilver

In other games

S2 Elite Four Koga.pngS2 Elite Four Koga alt.pngS2 Elite Four Koga alt2.png Spr Masters Koga.png VSKoga Masters.png
Portraits from
Stadium and
Stadium 2
Model from
VS model from

In the anime

In the main series

Koga in the original series

Koga appeared in The Ninja Poké-Showdown. He operates the Fuchsia Gym in the woods outside Fuchsia City. Aya, Koga's younger sister, is one of his students.

Ash and his friends managed to overcome the Gym's traps before meeting Koga, and Ash challenged him to a Gym battle. During the match, Ash's Pidgeotto initially lost to Koga's newly-evolved Venomoth, prompting Ash to call out Charmander. However, their match was interrupted when Team Rocket tried to steal Koga's large supply of Voltorb, even though they originally raided the Gym with the intent of getting Poison-type Pokémon. Team Rocket was eventually stopped by Psyduck's unexpectedly powerful Confusion attack. Koga then offered to trade his Venomoth for Psyduck, but Misty declined. Ash and Koga then had a rematch; pitting Charmander against Koga's Golbat, Ash triumphed and won the Soul Badge.

He reappeared in a flashback in The Fires of a Red-Hot Reunion!.


Koga is dedicated to perfecting his battling techniques. Like the traps in his Gym, he attempts to confuse and disorientate his opponents to get the upper hand during a match.


This article is missing information on this character's Japanese voice actor.
You can help by adding this information.

On hand

This listing is of Koga's known Pokémon in the anime:

Koga's Venonat

Koga's Venomoth
Venonat → Venomoth
When Ash challenged Koga, Koga sent out his Venonat, which Ash originally underestimated since he had previously defeated his Aya's Venonat quite easily but then it instantly evolved into a Venomoth, and proceeded to get the upper hand in its Gym battle with Pidgeotto. The battle was interrupted by Team Rocket, and afterwards, Koga offered to trade Venomoth to Misty for her Psyduck, but she declined.

Venomoth's known moves are Stun Spore and Sleep Powder.

Debut The Ninja Poké-Showdown
Voice actors
English Eric Stuart
Koga's Golbat
Main article: Koga's Golbat

During Koga's and Ash's rematch, Koga used his Golbat against Ash's Charmander. Golbat eventually lost to Charmander's strong Fire-type moves, winning Ash the Soul Badge.

Debut The Ninja Poké-Showdown
Voice actors
Japanese Shin'ichirō Miki
English Eric Stuart (EP032)
Shin'ichirō Miki (BW116)
Koga's Scyther
Koga's Scyther only appeared in a flashback in Bad To The Bone. Otoshi's flashback revealed that he defeated Scyther with his Marowak and obtained the Soul Badge.

None of Scyther's moves are known.

Debut Bad To The Bone
At Fuchsia Gym
Koga's Voltorb (multiple)
Voltorb (multiple)
Koga keeps these multiple Voltorb as traps in his Gym. They can be either hidden under the floor or be dropped from the ceiling. Ash, Misty, and Brock first came across one when Ash fell into a trap, stepped on one and it shocked him. Team Rocket attempted to steal the Voltorb from the Gym, and Meowth used these Pokémon as exploding bowling balls and threw them at the heroes.

The Voltorb's only known move is Self-Destruct, which they usually use when a trap is set off.

Debut The Ninja Poké-Showdown
Voice actors
English Eric Stuart

Voice actors

Language Voice actor
Japanese 大塚芳忠 Hōchū Ōtsuka
English Stuart Zagnit
Czech Petr Burian
Finnish Arto Nieminen (EP032)
Markus Bäckman (BW116)
Hungarian Seszták Szabolcs
Norwegian Tommy Karlsen
Polish Radosław Popłonikowski
Brazilian Portuguese Gileno Santoro
Spanish Latin America Gerardo Vázquez (EP032)
Enrique Cervantes (BW116)
Spain Juan Fernández Mejías (EP032)
César Martín (BW116)

In Pokémon Origins

Koga appeared briefly in File 3: Giovanni. He was seen losing a Gym battle against Red and handing him a Soul Badge as a proof of his victory.


Koga's Weezing
Weezing is Koga's only known Pokémon. It was used in his Gym battle against Red, but lost.

None of Weezing's moves are known.

Debut File 3: Giovanni

In the manga

Koga in Magical Pokémon Journey

In The Electric Tale of Pikachu manga

Koga in The Electric Tale of Pikachu

Koga makes a cameo appearance in Pikachu's Excellent Adventure.

In the manga, Jessie, James, and Meowth get trapped in Koga's Gym while searching for the Hidden Village with Ash's Pikachu, a Charmander, a Squirtle, a Kangaskhan, and Tommy. Their battle is only shown briefly in a montage sequence and it is unknown whether Team Rocket was victorious or not. It is also never shown if Ash himself battles Koga.

In the Magical Pokémon Journey manga

Koga makes a brief cameo in The Wal Comes Tumbling Down. Walnut, an aspiring ninja master, mentions that Koga is a big inspiration to him.

In the Pokémon Adventures manga

Koga in Pokémon Adventures

Koga uses custom-made Poké Balls that can be thrown as shuriken—perhaps an inspiration for Falkner's later boomerang Poké Balls.


Red, Green & Blue chapter

Koga is one of the three villainous heads of Team Rocket, and serves under Giovanni.

Koga debuts in Raging Rhydon, where he is searching the Moon Stone in Mt. Moon. Here, Koga fights with Red and Misty and forces his Rhyhorn to evolve with a mysterious injection, revealing what happened to Misty's Gyarados when it was kidnapped, but the mission fails. Koga later tries to scare off Red in Lavender Town's Pokémon Tower, and uses a Gastly to reanimate the corpses of dead Pokémon buried there. He also attacks Red with his Arbok. However, Blue has his Charmeleon slice Arbok in half. Under his boss's orders, he captures Articuno and brings it to Saffron City. He is once again defeated by Blue at Silph Co., albeit that he almost killed both of them by not allowing them to reach their Poké Balls by using his Muk, then almost freezing them to death with his Articuno. After he is defeated and knocked out, Red claims Koga's Soul Badge and Blue uses his special Golbat to find out where Team Rocket is holding his grandfather.

Yellow chapter

Koga helps the Pallet Town Trainers in the fight against the Elite Four at Cerise Island. Koga is paired with Blue and battles Agatha, but Blue first returns his Golbat to him. When the two of them finally meet Agatha in a cave, she uses her Arbok to cause stalactites to rain down on them, separating them. Agatha then makes Blue and Koga's Golbat (that he got paired up with again) face Agatha's Golbat. Meanwhile, Koga's Arbok had to face Agatha's Arbok, which could change its patterns, allowing it to gain the upper hand over Koga. When Blue was paralyzed from a Haunter's Lick, Koga started throwing his shuriken balls. Agatha thought this was a desperate tactic, but in reality they were Pokémon holding Paralyze Heals. Koga was hoping at least one of them would get to Blue, which it did. Blue then joins him, and Koga commands his Golbat to use Leech Life on himself. His blood is then put on Arbok's torso to prevent its ability to change its pattern. Without Arbok's ability, Agatha was seemingly defeated.

However, in reality, Agatha just pretended to be defeated and had her Gengar masquerade as Koga and Blue's shadow to slowly suck the life out of them. The two did not realize this at first, and reasoned Koga's loss of energy was due to his sudden loss of a large amount of blood. After traveling through the maze of stalactites for a while, they found themselves back where they started with Agatha nowhere to be found. They then figured out her plan and defeated the Gengar, but not before Koga is nearly crushed in the collapsing terrain of the destroyed battleground. He narrowly escapes using his Muk to defend him in his wounded state.

Gold, Silver & Crystal chapter

Unlike the other two Rocket Admins, who were instructed to return and manage their Gyms, Koga was not even reached by Giovanni. He then disappears for a time, leaving his daughter Janine in charge of the Gym. Janine is worried for her father, but opposes his criminal ties. Later, Koga reappeared with a new partner, Bruno, who had saved Koga when Cerise was about to collapse. They trained together for a while and both of them later met their former opponents Red and Blue, whose Rhydon was drilling underground towards Ilex Forest. Towards the end of the series, Koga and Bruno found Will and Karen in the Ilex Forest and persuaded them to work together. The new Elite Four is formed.

HeartGold & SoulSilver chapter

After long absence, Koga returns, along with the rest of the Elite Four, in Attaway, Aipom!. They face Gold in the Pokéathlon Power Course, with Koga taking part in the Circle Push event and easily winning it. Despite this, however, Gold manages to later make a comeback in the final event and win the course.


This is a listing of Koga's Pokémon in the Pokémon Adventures manga.

Koga's Rhyhorn

Koga's Rhydon
Rhyhorn → Rhydon
Koga's Rhydon was introduced as a Rhyhorn, where it fought against Red and Pika. When it was losing, Koga injected in with a mysterious needle, forcing it to evolve. In its evolved form, it was too much for both Red and Misty to handle, and they had to escape the battle by distracting Rhydon with an electrically charged boulder. It hasn't been seen again.

Rhydon's known moves are Rock Throw and Horn Drill.

Debut Raging Rhydon
Koga's Gastly
Gastly appeared in the Pokémon Tower, possessing the bodies of the dead Pokémon that were buried there, along with Blue and his Charmeleon. Red's Bulbasaur managed to destroy it by sucking up Gastly's gas form, and expelling it in a Solar Beam, freeing Blue in the process.

None of Gastly's moves are known.

Debut Sigh for Psyduck
Koga's Arbok
Arbok is one of Koga's most powerful Pokémon. It can regenerate itself even if it's cut in half, so as long as its head remains intact. It was used against both Blue and Agatha. It also possesses the ability to temporarily control a detached body part, such as its tail.

Arbok's known moves are Acid and Glare.

Debut That Awful Arbok
Koga's Golbat
Main article: Koga's Golbat

Koga's Golbat is much smaller than the average Golbat. His Supersonic can be used to create a magic mirror for scrying to see things from a distance, even if walls or land are in the way. After Blue defeated Koga at Silph Co., he stole Golbat to locate Professor Oak but later returned him to his rightful owner on Cerise Island.

Debut That Awful Arbok
Koga's Grimer
Koga wears a Grimer on his shoulder in the form of a ninja outfit in Pokémon Adventures. He used him extensively to smother Blue, preventing him from breathing and restricting his movements so that he would be unable to call on his Pokémon.

None of Grimer's moves are known.

Debut Go for the Golbat
Koga's Ekans
Koga has an Ekans on his arm. It was used first to dispatch Blue's Scyther in Silph Co., and during the battle of Cerise Island to get a Parlyz Heal it held to Blue. Ekans was later used in the HeartGold & SoulSilver chapter, where it fought with Bruno's Hitmonlee against Lance's Dragonite, but they were easily overtaken by its Hyper Beams.

None of Ekans's moves are known.

Debut Go for the Golbat
Koga's Muk
Koga's Muk was used on Cerise Island to battle the Elite Four, and proved useful in his survival after the island began to crumble. In the HeartGold & SoulSilver chapter, he was used during the Circle Push event of the Pokéathlon.

Muk's only known move is Poison Gas.

Debut Karate Machop!
Koga's Weezing
Koga's Weezing was used on Cerise Island to battle Agatha, mostly to bide time until Arbok regenerated.

Weezing's only known move is Smog, and its Ability is Levitate.

Debut Weezing Winks Out
Koga's Koffing
Koga used Koffing against Agatha on Cerise Island. He was instrumental in defeating her Gengar when he used his gas to convey a message to Blue.

None of Koffing's moves are known, and his Ability is Levitate.

Debut Striking Golduck
Koga's Tentacruel
Koga used Tentacruel to help Red and Blue as the two Pokédex Holders were digging to the Ilex Forest.

None of Tentacruel's moves are known.

Debut The Last Battle X
Koga's Articuno
Main article: Legendary birds (Adventures)

This Articuno was originally seen at the Seafoam Islands. Even though Red stopped one attempt, Team Rocket was finally able to catch this legendary bird because of its energy loss, and had it sent over for Koga afterwards. During the battle between Red, Blue, Green and Lt. Surge, Koga and Sabrina, it was merged with Zapdos and Moltres to create Thu-Fi-Zer after Sabrina took matters into her own hands. Once defeated and freed, it returned to the wild, where it was later caught by Green alongside its fellow Legendary birds.

Debut You Know...Articuno!

In the Pokémon Pocket Monsters manga

Koga in Pokémon Pocket Monsters
Koga as a Johto Elite Four member

Koga first appears in Save The Chansey!!. He is depicted as having a greedy personality.

He hires a Chansey torturer to kidnap the Chansey as they were valuable to him, something he only cared about. Red sneaks in with Clefairy and Pikachu to take the Chansey. After getting caught though, Koga releases Koffing and Grimer to stall Red and his Pokémon. However, Clefairy defeats them both, one by one, and rescues the Chansey.

In Aim to be the No. 1 Pokémon!!, he was revealed to have registered for the No. 1 Pokémon Contest. His did not have his greed this time and it wore off since then. Koga participates with Ninetales but loses since Ninetales did not dazzle the audience.

After Red's travels in Johto, Koga is revealed to have joined the Johto Elite Four in A Challenge to the Elite Four!. He, along with Will and Bruno fell from the Elite Four Tower, seemly defeated by Karen. Red asks them what happened, but Koga asks him to ask Karen herself. It is later revealed that after being exhausted from training, Karen decided to tell them a joke, and they fell down the building after hearing her dumb joke.


Koga's Koffing
Koffing was sent out as an obstacle so Red and the others wouldn't get to Chansey.

None of Koffing's moves are known.

Debut Save The Chansey!!
Koga's Grimer
Grimer is another Pokémon of Koga's. It first appeared rising from the trash cans nearby.

None of Grimer's moves are known.

Debut Save The Chansey!!
Koga's Ninetales
Koga sent out Ninetales to participate in the No. 1 Pokémon Contest. Its beauty managed to dazzle the audience but it was not enough for it to win.

None of Ninetales's moves are known.

Debut Aim to be the No. 1 Pokémon!!
Koga's Muk
Muk is one of Koga's Pokémon. It appeared on the top floor of the Pokémon League when Red found Karen up there. It is unknown if Muk evolved from Grimer, or if it is a separate Pokémon.

None of Muk's moves are known.

Debut A Challenge to the Elite Four!
Koga's Chansey
Chansey (multiple)
These Chansey were performers at a circus held by a Juggler. They were kidnapped by the Chansey Torturer for Koga's greed. They were strong enough to break free from the ropes that were tying them.

None Chansey's moves are known.

Debut Save The Chansey!!

In the Pokémon Zensho manga

Koga in Pokémon Zensho

Koga appears in PZ06, where he is seen in the Safari Zone training his ninjutsu skills. He accidentally throws one of his stars at Satoshi but misses luckily. Afterwards, Satoshi's Ditto volunteers to battle him and wins.


Koga's Weezing
Weezing is Koga's only known Pokémon. It was up against Ditto. When Ditto transformed into its master, Weezing became very confused and self-destructs afterwards, giving Satoshi the win.

Weezing's only known move is Selfdestruct.

Debut Fuchsia City

In the TCG

Koga has an eponymous Theme Deck in the Gym Challenge expansion.


KogaTCG1.jpg KogaVS.png
Koga and the Soul Badge Koga's updated VS art


This listing is of cards mentioning or featuring Koga or his Pokémon in the Pokémon Trading Card Game.

Koga's Pokémon
Cards listed with a blue background are only legal to use in the current Expanded format.
Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card Type English
Rarity # Japanese
Rarity #
Koga's Beedrill Grass Gym Challenge Rare Holo 9/132 Challenge from the Darkness Rare Holo  
Koga's Ditto Colorless Gym Challenge Rare 10/132 Challenge from the Darkness Rare Holo  
Koga's Arbok Grass Gym Challenge Rare 25/132 Challenge from the Darkness Rare  
Koga's Muk Grass Gym Challenge Rare 26/132 Challenge from the Darkness Rare  
Koga's Pidgeotto Colorless Gym Challenge Rare 27/132 Challenge from the Darkness Rare  
Koga's Golbat Grass Gym Challenge Uncommon 46/132 Challenge from the Darkness Uncommon  
Koga's Kakuna Grass Gym Challenge Uncommon 47/132 Challenge from the Darkness Uncommon  
Koga's Koffing Grass Gym Challenge Uncommon 48/132 Challenge from the Darkness Uncommon  
Koga's Pidgey Colorless Gym Challenge Uncommon 49/132 Challenge from the Darkness Uncommon  
Koga's Weezing Grass Gym Challenge Uncommon 50/132 Challenge from the Darkness Uncommon  
Koga's Ekans Grass Gym Challenge Common 77/132 Challenge from the Darkness Common  
Koga's Grimer Grass Gym Challenge Common 78/132 Challenge from the Darkness Common  
Koga's Koffing Grass Gym Challenge Common 79/132 Challenge from the Darkness Common  
Koga's Pidgey Colorless Gym Challenge Common 80/132 Challenge from the Darkness Common  
Koga's Tangela Grass Gym Challenge Common 81/132 Challenge from the Darkness Common  
Koga's Weedle Grass Gym Challenge Common 82/132 Challenge from the Darkness Common  
Koga's Zubat Grass Gym Challenge Common 83/132 Challenge from the Darkness Common  
Koga's Crobat Grass       Pokémon VS Common 079/141
Koga's Forretress Grass       Pokémon VS Common 080/141
VenomothGX Grass Unbroken Bonds Ultra-Rare Rare 12/214 Night Unison RR 002/055
Unbroken Bonds Rare Ultra 193/214 Night Unison SR 056/055
Unbroken Bonds Rare Secret 216/214 Night Unison HR 064/055
Other related cards
Card Type English
Rarity # Japanese
Rarity #
Koga T Gym Challenge Rare Holo 19/132      
Gym Challenge Rare 106/132 Challenge from the Darkness Rare  
Fuchsia City Gym T [St] Gym Challenge Uncommon 114/132 Challenge from the Darkness Uncommon  
Koga's Ninja Trick T Gym Challenge Uncommon 115/132 Challenge from the Darkness Uncommon  
Koga's Ninja Gym T [St]       Unnumbered Promotional cards    
Gym Badge I XY Black Star Promos   XY207 XY-P Promotional cards    
Koga's Trap Su Unbroken Bonds Uncommon 177/214 Night Unison U 050/055
Unbroken Bonds Rare Ultra 211/214 Night Unison SR 063/055
Hidden Fates Uncommon 59/68      

In the TFG

Koga appears as a Trainer figure in the Groundbreakers expansion pack of the Pokémon Trading Figure Game.


  • Out of the original Generation I Gym Leaders, Koga has the fewest Trainer cards in the Gym Leader sets of the TCG.
  • Koga is the first Elite Four member who was introduced in an earlier generation and then attained the title in a later generation.
  • Koga is the only Gym Leader introduced as of Generation V who does not appear in Black 2 and White 2. This is due to his status as an Elite Four member in the Generation II and IV games.
  • Koga uses a Venomoth on his team in all of the games in which Sabrina does not use one on her team, and vice-versa.
  • Koga and Janine are the only two Gym Leaders to have the same slogan in different generations.
  • Koga appears as an opponent in Pokémon Puzzle Challenge, where he uses a Crobat.


Language Name Origin
Japanese キョウ Kyō The on-yomi of the kanji for "apricot" (杏). This kanji's kun-yomi is anzu.
English, French, German,
Italian, Spanish, Brazilian
Koga From 甲賀流 Kōga-ryū, a school of ninjutsu.
Korean 독수 Doksu Means poison fang which refers to his specialty in the Poison-type. Alternatively, 독수 can mean a vicious clutch.
Chinese (Mandarin) 阿桔 Ā Jié From 桔梗 jiégěng (Chinese bellflower)
Chinese (Cantonese) 阿桔 Ā Git *
阿梗 Ā Gáng *
From 桔梗 jiégěng (Chinese bellflower)
From Japanese 梗 kyō
Thai เคียว Kyō Transliteration of his Japanese name.
Vietnamese Kyo Transliteration of his Japanese name.

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Bosses: Giovanni (animeAdventuresPocket Monsters)

Madame Boss*Masked Man*

Executives: ArcherArianaPetrelProton


Jessie, James, & Meowth (JJM)
Koga, Lt. Surge, & Sabrina (Triad*)
Ken, Al, & Harry (TRET)*
Carr, Sird*, & Orm (T3B*)
Duos: Butch & Cassidy*Attila & Hun*Annie & Oakley*

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Domino*Iron-Masked Marauder*Dr. Namba*Sebastian*
Rocket Scout*Wendy*Tyson*Jubei*Viper*Christopher*
Matori*Pierce*Dr. Zager*Gozu*Miyamoto*Mondo*

Main characters
Ash KetchumPikachuGary OakRitchieMay OakProfessor OakDelia KetchumJessieJamesMeowth
Gym Leaders
A.J.AyaBillDamianDarioDuplicaEevee brothersGiselleJeanette FisherOfficer JennyJoeNurse Joy
Lara LaramieMahriMelanieMikeyMimiProfessor OrvillePotterFlorinda ShowersRubySamuraiTommy

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