A game that's both competitive and really dumb all in one neat package.
Pretty much Sega Smash Bros.
I think it's especially nice you can choose between the slightly "grounded" Virtua Fighter 2 mode and more wild Fighting Vipers mode. Even some details like Rent-A-Hero having his battery mechanic from the game with the same name.
Big, BIG shame a sequel or even rerelease hasn't been made since.