Berserk

Summary: Raises Special Attack by one stage upon falling below 50% health.

Description

This Pokémon has a calm and playful personality, leading it to behave gently even in battles -- it'll hold back and it won't show its true power unless it genuinely feels challenged or outraged. The first time this Pokémon's health stands below 50% after direct damage from an opponent's move, its Special Attack will increase by one stage as it starts to battle seriously and show what it's truly capable of.

Pokémon