BeefiestName

I'd like to see Jack, Harken, or Zed from Wild Arms on the VG list!

Problem: Witchers can't get women pregnant. What's he really doing with the 30,000 gold coins?

I think Orochimaru takes it all. Dude's VERY hard to kill - especially at his absolute peak. Most of the series he's actually not in the best shape, and still manages to be a total badass.

If Captain America doesn't know what he's getting into he'll see just some guy at first. I think he'll probably be in some trouble.

I don't think it's fair for Himura Kenshin to be placed on this list. Characters like Ichigo and Inuyasha are so much more powerful by comparison and possess vast supernatural powers. Kenshin is a human that trained in a really great sword fighting technique and is almost unbeatable by normal human standards. This battle, though, isn't Kyoto during the revolution, nor is it Tokyo during the Meiji era. He's out of his element, and lacks the durability needed to survive the first few minutes. Also, if he's fighting opponents that are using supernatural powers or completely foreign fighting styles his ability to predict the enemy's movements would also be rendered useless.

Captain America vs. Luffy sounds like a mismatch to me.

Tamriel.

Just list all of the factions, and realize that every member of all of those factions will be on the same side in this battle.

There are powerful wizards, stealthy assassins, and skilled soldiers and fighters. There are godly artifacts with mystical powers.

The things Tamriel will bring to the fight are too numerous for one person to think of it all.

Hiei

Data takes out the entire bridge crew of the USS Enterprise. All modes.

Beatrix Kiddo might be able to take the other deadly vipers if not pregnant, expecting the fight, armed. Morals irrelevant since they all fight to kill anyway.

Souther/Thouzer (however you wish to spell it) would probably solo the other Nanto Roku Seiken. They state that because he's the polar star that it's not possible for him to be defeated by Nanto martial arts. Again, morals basically irrelevant, it'd be a deathmatch in all 3 rounds.

Kenshiro could solo the "Hokuto Army" in series 2.

Falco could probably solo the Celestial Empire in series 2.

Kaioh could probably solo all Shuras in series 2, but having to fight Hyo and Han at once could theoretically cause him trouble.

Raoh can stomp the Ken-Oh army, even Uigher and Ryuga.

Shin/King could easily solo the Kingsmen from the manga. Spade, Diamond, Club, and Heart would be no problem.

Shishio could probably take out the other Jupponggatana. At least they represent him as being this strong. I don't think the feats back it up though.

Aoshi Shinomori could easily slay the rest of the Oniwabanshu.

I'm sure I'll think of more.

I think what the OP intended are: All of GI Joe+Cobra, He-Man and all of the major fighters from Eternia (including villains), all of the Thundercats and their regular villains, plus all Autobots and Decepticons.