Ability
Berserk
This Pokemon's Sp. Atk is raised by 1 when it reaches 1/2 or less of its max HP.
Pokémon with Berserk (2)
"hidden" means it is that form's hidden ability. Megas have a fixed ability.
Data: Pokémon Showdown (smogon/pokemon-showdown) · commit d601443 · Data & methodology