Prankster (Japanese: いたずらごころ Teasing Heart) is an Ability nineteen Pokémon can have.
Prankster increases the priority of status moves by one.
Dark-type Pokémon are immune to opposing Pokémon's moves that gain priority due to Prankster, including moves called by moves that call other moves (such as Assist and Nature Power) and excluding moves that are repeated as a result of Prankster-affected Instruct. Ally Dark-type Pokémon are still affected by the user's status moves.
Dark-type Pokémon can still bounce moves back with Magic Bounce or Magic Coat; moves that have increased priority due to Prankster which are reflected by Magic Bounce or Magic Coat can affect Dark-type Pokémon, unless the Pokémon that bounced the move with Magic Coat also has Prankster. Moves that target all Pokémon (except Perish Song and Rototiller, which cannot affect Dark-type opponents if boosted by Prankster) and entry hazard moves are successful regardless of the presence of Dark-type Pokémon.