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Its hard shell repels any kind of attack. It is vulnerable only when its shell is open.
Abilities, attacks, weakness & resistance
Flip a coin. If heads, the Defending Pokémon is now Confused.
Flip a coin. If heads, prevent all damage done to Shellder during your opponent's next turn. (Any other effects of attacks still happen.)
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Shellder (base3-54 First Edition) is a Basic Water-type Pokémon from the Fossil set illustrated by Mitsuhiro Arita. It has two single-Water-energy attacks: Supersonic can Confuse the Defending Pokémon on a successful coin flip, and Hide in Shell can prevent all damage to Shellder next turn on a successful coin flip. The card has a Lightning weakness and a one Colorless retreat cost, and its flavor text notes its hard shell leaves it vulnerable only when open.
Catalog pricing data as of 19 Apr 2026, 18:17