The user curls into a ball and rolls around. Any Pokemon that is hit by the attack is forced into the ball as well, adding 20 power to the attack overall. Allies can voluntarily jump into the attack and increase its power without taking damage. The original user maintains exclusive control, but the more Pokemon assimilated, the harder it is to maneuver. The attack keeps going until the Pokemon ball hits a large object that is too heavy or is attached to the ground (such as a boulder or tree, or even a Pokemon too huge to be forced into the ball), and upon collision every Pokemon in the ball takes recoil.