Suggested by Sonic Captain Planet is pretty powerful. While his weakness is extremely easy to exploit you have to give him credit for always getting back up to give it another whirl. Still, I would have to give the edge here to Phantom. Phantom is fast enough to stay out of Planet’s reach for the entirety of the fight and then counter with quick cuts. Phantom’s moves have been shown to be able to damage Reploid metal and so Planet would not walk away unscathed. The hits would add up very quickly and so Planet will go down without being able to even put up much of a fight. Phantom (Zero) wins.