Once per turn, if you Fusion Summon a "Prank-Kids" Fusion Monster (except during the Damage Step): You can have all monsters you control gain 500 ATK (even if this card leaves the field).

Once per turn, if you Link Summon a "Prank-Kids" Link Monster (except during the Damage Step): You can have all monsters your opponent controls lose 500 ATK (even if this card leaves the field).