User blog comment:Hyper Zergling/HZ's Reviews/@comment-3122168-20110401201810/@comment-3097771-20110402223814

I'm not gonna get into an argument as to why Kid Buu is the strongest buu. But clearly, in the anime, it is stated that when he transforms (or regresses) into Kid Buu, his power is "even stronger than before". So yeah. -KidVegeta