
Kamehameha...huh. Looks like child emperor is dragon ball fan ╮( ̄▽ ̄)╭

No, yeah, it's obvious now. The Japanese name is Genki Dama, which literally means "Energy Ball". I initially watched the dub and while I'm on board with most of the Japanese technique names now, "Genki Dama/Energy Ball" still doesn't sit right with me. It sounds, I don't know, underwhelming?
That being said, it can only be cast with one hand, to charge it requires both. And it would take way too long in this fight.
Just skip to next page ε=ε=(ノ≧∇≦)ノ
After that read again start from second page