Clamp is a damaging Water-type move that traps the target for 4-5 turns. It will prevent the target from switching out or escaping, and it will also damage the target for 1 of their maximum HP each turn for the duration of the attack. The effects of Clamp will be negated if Rapid Spin is used by the afflicted Pokémon. In a wild Pokémon battle, the active Pokémon can still flee from battle if it is holding a Smoke Ball.
By prior evolution