Suggested by Sonic Hellboy is reasonably tough. Think of him sort of Luke Cage level as he’s got superhuman strength and speed. His speed in particular is pretty solid and edges into super territory. (As opposed to superhuman) That being said, Captain Planet completely outranks him in all categories. He can fly extremely fast and is basically a budget Superman. Hellboy will have a hard time damaging him although he could probably use one of Planet’s many weaknesses against him. So long as the Captain ends the fight quickly it shouldn’t be an issue though. Captain Planet wins.
Captain Planet has super strength and speed. With his awesome power he can take down many opponents. Omega has some tough beams, but they wouldn’t be able to hit Captain Planet. Captain Planet is just too fast. He gets his first win in a while. The name of the planets lives on a little longer. Captain Planet wins.
But in the comics Omega has speed and power enough to take down Captain Planet. Planet doesn’t have enough skills to win anymore. Omega wins.