Board Thread:General Discussion/@comment-24587518-20140329194023/@comment-5543071-20140408042152

I don't think Ditto's attacks would hurt Upgrade, due to his liquid like body. Upgrade could shoot lasers (at least once upon a time, I don't know about anymore). However, the cloning gives Ditto an advantage.

That aside, if we are comparing the Omnitrix aliens, and not their species, I think that Upgrade could merge and hack Ditto's Omnitrix, forcing him to revert or remerge or something. I think Upgrade would win in the long run.