From Dragon Ball Wiki, the ''Dragon Ball'' encyclopedia
The Makousen (激裂光弾) is an energy sphere used by Piccolo Jr.. Piccolo puts his hands together in front as he charges a blazing white aura and forms a yellow energy sphere in his hands. He then brings his hands forward and fires the energy sphere, inflicting a massive amount of damage.
Piccolo used this attack in his battle against Cell in his Imperfect Form. After being knocked down by Cell, Piccolo charged up and fired the Makousen against the approaching Cell, creating a huge explosion. While it did blast Cell into the ocean, the Artificial Human emerged completely unscathed, much to Piccolo's shock.
Makousen appeared in the Budokai video game series and Budokai Tenkaichi video game series as Light Grenade. It is one of Piccolo (End)'s Blast 2 attacks. It reappeared in Dragon Ball: Raging Blast, but it was changed to his Ultimate Attack. In this game, when someone is hit by this attack it changes from a energy ball to a large energy blast like it was in the original series. This is the same in Dragon Ball: Raging Blast 2 although the attack was upgraded and is nicer looking.