7x9 - Dragon Ball Z: Dragon Box

Gotenks launches a surprising new finishing move against Boo--the Super Ghost Kamikaze Attack! Multiple ghosts, which are produced from Gotenks' mouth, charge at Boo and explode! Boo is blown into little pieces! Or so it is thought, as once again, the fragments combine together again as Boo regenerates himself. In order to keep Boo locked up inside the Room of Spirit and Time, a despondent Piccolo destoys the room's door.