From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Garlic Jr. puts his right hand back and charges a reddish-pink energy sphere. He then brings his hand forward and fires the energy sphere in the form of a wave of energy at his opponent, inflicting a great amount of damage.
Garlic Jr. used this attack in an attempt to stop Kami and Mister Popo from escaping to reverse the side effects of the Black Water Mist with the Sacred Water. Piccolo Junior appeared and deflected the Death Impact away, however, allowing Kami and Popo to escape. Garlic Jr. also used this attack in his battle against Piccolo.
Death Impact is named in the Budokai Tenkaichi video game series and is one of Garlic Jr.'s Blast 2 attacks in his Super form. The beam that Super Garlic Jr. fires in the Budokai Tenkaichi video game series looks very similar to the Belly Blast.