When a Pokémon with Quark Drive is on the field and Electric Terrain is active, or the Pokémon is holding Booster Energy, its highest stat (other than HP and taking into account stat stages, but not held items) is increased by 30%, or 50% if Speed is the highest stat. Upon activation, a message tells which stat is increased to all the players. If multiple stats are tied for highest, Quark Drive breaks the tie by prioritizing Attack, Defense, Special Attack, Special Defense, and Speed, in that order.
Quark Drive will activate even if the Pokémon is not grounded. Electric Terrain will activate Quark Drive before a held Booster Energy, so the Booster Energy will not be consumed if the Pokémon with Quark Drive is on Electric Terrain. Quark Drive's stat increase cannot be passed by Baton Pass.
Skill Swap and Doodle will fail if either Pokémon has Quark Drive. Gastro Acid and Role Play will fail if the target has Quark Drive; however, Simple Beam and Worry Seed will work. Quark Drive cannot be copied by Receiver, Trace and Power of Alchemy or replaced by Lingering Aroma. If a Pokémon obtains Quark Drive with Imposter or Transform, the Ability will not activate regardless of if the Pokémon is on Electric Terrain or holding a Booster Energy.
