Board Thread:Monster Discussions/@comment-4851935-20131225172605/@comment-25285745-20150909144122

Keizer Ghidorah is canonically Godzilla's strongest opponent. Going by that statistic alone, he should win, but both SpaceGodzilla and Destoroyah have some advantages over him. SpaceGodzilla has a wider variation of attacks and can blast both monsters from a distance, plus block Keizer Ghidorah's gravity beams, which could prevent Keizer Ghidorah from hurting him at all, since all he can do is bite and use gravity beams. Destoroyah can withstand more than any of the other two monsters. Yes, Burning Godzilla forced him to break apart after a series of attacks, but that's because he went after his weak point on his chest. Godzilla blasted Destoroyah's chest, which basically ruptured him from the inside, then punched the wound. That's why Destoroyah had to break apart. And since SpaceGodzilla and Keizer Ghidorah don't have any intense heat or cold-based attacks, Destoroyah could keep fighting them for a long period of time, and just break apart and reform any time he was seriously hurt.

So, I'll go with Destoroyah since he's decently well-rounded, and can withstand most of what SpaceGodzilla and Keizer Ghidorah can throw at him without dying.