In the anime
Raichu made its appearance in Electric Shock Showdown where it was responsible for brutally defeating many opponents, as the Pokémon Center started to get crowded. This happened before Ash entered the Vermilion City Gym. Later during Ash's arrival, Lt. Surge sent it out to him and his friends. Lt. Surge laughed at Ash for not evolving Pikachu, thinking evolved Pokémon are always better. This infuriated him and made Pikachu, also infuriated, want to battle Raichu.
In the battle, both sides started off with Thunder Shock but Raichu's turned out to be more powerful, which weakened Pikachu drastically. Raichu then easily defeated Pikachu with a combination of Mega Punch and Mega Kick.
Ash returned to the Gym for a rematch after Pikachu was healed. He ignored Lt. Surge's advice on evolving Pikachu into a Raichu. In the rematch, Raichu was able to hit Pikachu with Body Slam but Pikachu was able to use two new attacks, Agility and Quick Attack, which were both learned before the rematch, before being finished off. As Raichu evolved too fast, it never learned any speedy attacks. Pikachu took advantage of this by using his speedy attacks to confuse Raichu. Lt. Surge decided to cancel them by having Raichu use Thunderbolt on the field. However, Pikachu dodged it by using his tail. When Raichu was about to use Thunderbolt again, it ran out of electricity which gave Pikachu the upper hand. Pikachu finished Raichu off with his tail attack before Raichu made full contact with Take Down. As Ash eventually defeated Lt. Surge in a rematch, it proved to him that evolved Pokémon are not always better.
Raichu reappeared in a flashback in Pikachu's Goodbye when Ash was recalling the fun times he had with Pikachu, and in another one in Bad to the Bone, where Raichu was defeated in a Gym battle by Otoshi's Marowak. Both Raichu and Lt. Surge reappeared in another flashback in Pika and Goliath!.
Personality and characteristics
Raichu's attitude towards Ash's Pikachu almost completely mirrors Lt. Surge's attitude toward Ash. When they first meet Raichu, it doesn't have a high opinion of Pikachu. However, after being defeated, Raichu grows to respect him.
| Using ThunderShock
| Using Thunderbolt
| A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
In Pokémon Origins
Lt. Surge and Raichu in Pokémon Origins
Raichu was seen briefly in the episode File 2 - Cubone of Pokémon Origins. It was used by Surge in his Gym battle against Red, but was defeated off-screen.
In the games
Raichu appears as Lt. Surge's Pokémon in the player's Gym battle against him in all games he appears in. In Pokémon Yellow, it is his only Pokémon, much as in the anime. In other games it is not his only Pokémon, but it is always present. Lt. Surge's Pikachu that he has in the games is also shown below, since Surge said in the anime that he obtained his Raichu as a Pikachu.
In the manga
Raichu in Pokémon Adventures
In the Pokémon Adventures manga
Lt. Surge's Raichu debuted in the Pokémon Adventures manga in Go for the Golbat during Surge's battle with Red. However, it wasn't seen battling until the Gold, Silver & Crystal chapter round Raising Raichu, where Surge used it to battle against the Masked Man. Later, when Surge encountered the frozen Red Gyarados at the Lake of Rage, he used Raichu to power up his submarine's underwater laser. However, as the thawed Gyarados wasn't willing to fight him, but instead trying to break another block of ice at the bottom of the lake, Surge ended up using the laser on the ice block, which turned out to contain some of the gears of Gold and Silver, who had previously fought the Masked Man at the lake.
Raichu was also briefly seen in Hello, Lickitung, where Surge used its sharp tail as a warning for Morty to not to struggle against him, as well as in Yikes, It's Yanma!, where it was seen standing alongside Surge during the introduction of the Kanto and Johto Gym Leaders.
Raichu in Pocket Monsters HGSS Jou's Big Adventure
In the Pocket Monsters HGSS Jou's Big Adventure manga
Lt. Surge's Raichu only appeared as a silhouette in Betting on the Name of the Strongest! along with its Trainer and the other Kanto Gym Leaders as one of the obstacles Jou must face.
In the TCG
Lt. Surge's Raichu has been depicted in in the TCG. The following is a list of cards involving either his Pikachu or Raichu.
For more information on this Pokémon's species, see Pikachu and Raichu.