klawf
Abilities
anger shell
When an attack causes its HP to drop to half or less, the Pokémon gets angry. This lowers its Defense and Sp. Def stats but boosts its Attack, Sp. Atk, and Speed stats.
shell armor
A hard shell protects the Pokémon from critical hits.
regenerator
The Pokémon has a little of its HP restored when withdrawn from battle.