Krabby is a crustacean Pokémon with a strong outer shell protecting its small body. Its upper half is red and has its eyes and two small spikes on the top of its head. Its light tan arms are also connected to its upper body. Its lower body is light tan and doubles as its jaw with two fangs overlapping its upper body. Its hips are visible on the lower front of its body connected to its four long, thin legs. Each leg has a single, claw-like foot. The main features of Krabby's body are the two large, red pincers at the end of its arms. Krabby uses them as its main form of offense, and as a form of balance. Sometimes, Krabby may lose a claw during battle or have a damaged claw forcibly removed. However, the claw regenerates over a short period.
In the wild, Krabby lives near the edge of water in both fresh and salt water. Krabby is most commonly found on beaches where it burrows in the sand. In times of scarce food sources, it may eat sand to regain nutrients and will be very aggressive in defending its home. Its main form of defense is creating foam to shroud its body, in order to confuse opponents into thinking that it is bigger than it actually is. As seen in the anime, Krabby generally keeps to itself, but will quickly defend itself if provoked. In the past, Crabhammer was its signature move.
In the main series
Major appearances
Ash caught a Krabby in Mystery at the Lighthouse. It was transferred to Professor Oak's lab, and he didn't use it until Round One - Begin!. After defeating an Exeggutor in its first battle, Krabby evolved into Kingler.
Other
A Krabby appeared in The Evolution Solution as a resident of Seafoam Island. It grabbed a Slowpoke's tail and Psyduck's head with its pincers.
A Krabby appeared in Expedition to Onix Island! as a resident of a deserted island. It got into trouble with Oshawott and Piplup.
Minor appearances
A larger-than-average Krabby debuted in Mystery at the Lighthouse, under the ownership of Gary Oak. It briefly reappeared in Showdown at the Po-ké Corral, where Gary compared its size to Ash's Krabby's size.
A Krabby appeared in Island of the Giant Pokémon.
A Krabby appeared in Pikachu's Vacation as one of the Pokémon seen at the Pokémon Theme Park.
A Krabby appeared in Lights, Camera, Quack-tion, as part of the film crew for the movie "Pokémon in Love".
A Krabby appeared in a flashback in The Lost Lapras.
A Krabby appeared in Misty's fantasy in Bye Bye Psyduck.
Multiple Krabby appeared in The Power of One, where they were among the numerous Pokémon who sensed the disturbance caused by Lawrence III.
A wild Krabby appeared in Pikachu's Rescue Adventure.
Two Krabby appeared in Flower Power as parts of Florando's annual Pokémon Exhibition.
A Krabby appeared in Tricks of the Trade as one of the Pokémon seen at the Pokémon Swap Meet in Palmpona.
A Trainer used a Krabby in Hook, Line, and Stinker to aid him in the annual Seaking Catching Competition.
A Krabby appeared in Beauty and the Breeder, under the ownership of a Pokémon Breeder participating in a Pokémon breeding competition.
Three Krabby appeared in Got Miltank? as inhabitants of a Pokémon-exclusive oasis.
A Krabby appeared in Pokémon Mystery Dungeon: Explorers of Time & Darkness.
A Krabby appeared in Gone Corphishin' in a fantasy.
A Krabby appeared in PK19.
A Krabby appeared in Bagged Then Tagged!.
A Krabby appeared in Teaching the Student Teacher! on the rocks.
A Krabby appeared in The Island of Illusions! as a resident of Grand Spectrala Islet.
A Krabby appeared in Going for the Gold!, where it was among the Pokémon seen in the Ambrette Aquarium.
A wild Krabby appeared in Alola, Kanto!, where it was among the Pokémon seen at Professor Oak's Laboratory.
A Krabby appeared in Keeping Your Eyes on the Ball!, under the ownership of the master caddy. He uses it as a club for Pokémon Golf.
A Krabby appeared in The Wisdom Not to Run!, where it saw a group of Meltan arrive at Manalo Stadium.
Pokédex entries
Episode
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Pokémon
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Source
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Entry
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EP013
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Krabby
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Ash's Pokédex
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Krabby. Lives near the shore. Its average height is about 16 inches.
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Episode
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Pokémon
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Source
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Entry
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BW087
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Krabby
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Dawn's Pokédex
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Krabby, the River Crab Pokémon. Living on sandy beaches in burrows it digs, Krabby can grow back its pincers if they break off in battle.
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In Pokémon: Twilight Wings
A Krabby appeared in Early-Evening Waves.
In The Electric Tale of Pikachu manga
In The Orange Islands, Ash saved a Lapras from a group of Krabby that were attacking it.
In the Pokémon Adventures manga
During A Tale of Ninetales, Red caught a Krabby off-screen while he had some Blue's Pokémon in his party by mistake. Later, in What a Dragonite, after HM03 (Surf) was destroyed Krabby was traded for Misty's Gyarados, Gyara, since he already knew how to use Surf. She later appeared again with Misty worrying for Red in Do Wrong, Dewgong!.
A Krabby appeared in Murkrow Row, where it resided in Gold's house.
Misty later saved a Krabby trapped in Tohjo Falls in Chinchou in Charge. This act of kindness prompted Suicune to pick Misty as its Trainer, besides her being the expert for Water-type Pokémon.
In the Pokémon Zensho manga
In PZ06, Satoshi received a Krabby, among a few other Pokémon, from a Fisherman in exchange for the Dratini he found.