Sandslash

It curls up, then rolls into foes with its back. Its sharp spines inflict severe damage.

Spike Armor: During your opponent's next turn, if Sandslash is damaged by an opponent's attack (even if Sandslash is Knocked Out), put 4 damage counters on the Attacking Pokémon.

Poison Spike (60): If the Defending Pokémon already has any damage counters on it, that Pokémon is now Poisoned.