Description, catalog fields, rules text, and how it plays—in one place.
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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 Unlimited) is a Basic Water-type Pokémon from the Fossil set with common rarity. It has two one-energy attacks: Supersonic, which can Confuse the opponent on a coin flip, and Hide in Shell, which can prevent all damage to Shellder on a successful flip. The card carries a Lightning weakness and a one Colorless retreat cost, making it a lightweight defensive option in early-game lines.
Catalog pricing data as of 19 Apr 2026, 18:17