Ability
Psychic Surge
On switch-in, this Pokemon summons Psychic Terrain.
Terrain Psychic Terrain
Lasts 5 turns (8 with Terrain Extender). Psychic-type moves used by grounded Pokémon deal 1.3× damage. Grounded Pokémon can't be hit by the opponents' priority moves (e.g. Fake Out, Sucker Punch, Extreme Speed, or Prankster status moves).
Only one terrain can be active at a time: a new one replaces the old one. "Grounded" means not Flying-type and without Levitate or Air Balloon.
Pokémon with Psychic Surge (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