When deciding whether to team up with Piccolo or fight solo in Dragon Ball Sparking Zero, don't stress too much, as both options are equally viable, and you can always replay the episode to choose the

After fusing with Kami, Piccolo gains a new moveset and his old Ultimate Attack, Special Beam Cannon, becomes a Super Attack instead. This can be used to deal a ton of damage at the end of any combo that launches your target, though unfortunately, the All-Out Skill is replaced by the weaker False Courage Skill, which buffs Piccolo's defense.