The user gets all party Pokémon to attack the target. The more party Pokémon, the greater the number of attacks.
Hits once for each Pokémon in the user's party, including the user and excluding any Pokémon that have fainted or have a major status condition. Each hit's base power is decided individually for each healthy Pokémon, and is equal to (party member's base Attack stat) / 10 + 5. Changes to the party's stat stages, e.g. via the use of Swords Dance, are not considered, but if the user is holding an item such as a Choice Band then the item's effect will be applied to each hit. The random factor in the damage formula is not used.