Moon busting? It was a meteor about to fall into Earth. Even then, the feat's non-canon because it came from Capcom Fighting Evolution (a crossover game of different Capcom fighting game franchises). At worst, Akuma's been shown to split Ayer's Rock in half and take out a nuclear submarine while moving around underwater for an indefinite amount of time while Goku's capable of busting planets and taking blasts that could wipe out entire lands. Goku definitely owns Shin Akuma in this battle.