Battle Royale III: Frenemy mine.

[Prime32]

Goliath & Demona (Gargoyles) vs Megaman & Protoman (Mega Man)

Gargoyles never aired here.

Godzilla & MechaGodzilla (Godzilla) vs Morpheus & Agent Jones (Matrix)

Domon Kasshu & Master Asia (Gundam) vs Hulk & Magneto (Marvel Universe)

The G Gundam guys could defeat Magneto on foot, but they'd need their mechs to hit Hulk with enough force to put him down. And Magneto would destroy their mechs before they could do that.

Dumbledore & Voldemort (Harry Potter) vs Apollo & Mister Rictus (Mark Millar)

Don't know the Millar guys.

Seras Victoria & Alexander Anderson (Hellsing) vs Yoshi & Bowser (Mario)

Hiro & Sylar (Heroes) vs Jack Rakan & Evangeline A.K McDowell (Mahou Sensei Negima)

Eragon & Murtagh (Inheritance Cycle) vs Elrond & Smaug (Lord of the Rings)

Link & Ganon (Legend of Zelda) vs Bugs Bunny & Tasmanian Devil (Looney Toons)

Though Ganon would get humiliated along the way.

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Someone want to give some info on the Mahou people? Hiro and Sylar are both quite formidable.

I'd say the Heroes characters are greatly outclassed.

http://outskirtsbattledome.wikispace...e+-+Jack+Rakan
http://outskirtsbattledome.wikispace...+A.K.+McDowell

Their powers are skill-based so Sylar can't copy them, and Jack is unlikely to be harmed by anything short of a nuke. Plus Jack specialises in doing things that don't make sense, so he could probably break out of being frozen in time somehow. As for his attack strength...

I need to think of a finishing move for Negi. He's a lot weaker than me so I can't put much power into it. *charges up energy* Now I just need to think of a name...
www.youtube.com/watch?v=saVX9O8uqrE

Evangeline could win in one move.
EDIT: A copy of Evangeline several times weaker than the original

(note: The various anime adaptations of Negima are... odd - only one really shows the cast's combat abilities at all, and it's pretty compressed. Plus Eva has her power sealed for most of their plot.)