Best Game Mashups -- Official and Unofficial

[brycester]

Neo Coliseum, Battletoads Double Dragon. Fighting Vipers, X-Men vs Street Fighter, Warrior Orochi 1 and 2, Cannon Spike.

[Reverend]

Neo Coliseum, Battletoads Double Dragon. Fighting Vipers, X-Men vs Street Fighter, Warrior Orochi 1 and 2, Cannon Spike.

How could we forget Canon Spike!?

Also, yay, 500th post

[GSZX1337]

knuckles in sonic 2

Knuckles is part of the Sonic series, so this doesn't count.

[Original_Name]

Oh my god, Fighters Megamix! How could I be the first to mention Virtua Fighter+Fighting Vipers+Sonic the Fighters+Virtua Fighters Kids+Virtua Cop+Daytona USA+Rent-A-Hero?

[J T]

Serve up. Mash up. Feel up.-- DOA Beach Volleyball.

[DCsegaDH]

Beats of Rage,it has a lot of KoF characters mixed in a SoR world!
SNK vs Capcom: SVC Choas,it has Mars people(Metal Slug), Demitri(Darkstalkers),etc.
Street Fighter Alpha series,features fighters from Final Fight(Cody,Guy,Sodom,Rolento) and SF 1(Gen,Birdie,Adon)

[Anapan]

The PC Doujinsoft Queen of Heart series. Fighting games with To Heart characters and others in an Asuka 120% clone engine. Very easy to rack up huge combos. I think Eternal Fighter Zero is similar, but haven't played it much.
More here: http://www.ntsc-uk.com/feature.php?feat ... inFighters

Does Mario Vs. Donkey-Kong GBA count?
Wai Wai World for NES
Capcom Fighting Evolution.

Uhh.. Maybe it classifies as a mod, but there's that Megaman game for the Zelda Classic engine.