Beat up...

Type Dark
Category Physical
PP 10 (max. 16)
Power 10
Accuracy 100%

Beat Up inflicts damage on the target from each conscious Pokémon in the user's party which does not have a major status ailment. Each attack is typeless and has a base power of 10; damage is determined using each attacking Pokémon's base Attack and the target's base Defense, IVs, EVs, Natures, and type advantages are not considered. Beat Up skips the randomization factor, but does apply same-type attack bonus for Dark-type Pokémon. Beat Up ignores Wonder Guard.
In a double battle, if a Pokémon uses Beat Up on its partner, the partner will attack itself (unless it suffers from a status ailment).
Each attack is preceded with the message "<name>'s Attack!", where <name> is the name of the Pokémon in the player's party.