OMG! My brother told me about this game called MUGEN where people upload their own characters in the game ( any character!) so I looked for some videos of it on you tube and sure enough here's what I found.

ssj5 Goku VS. ssj4 Broli

Homer Simpson VS. Sephiroth

Scorpion VS. Ella (girl from The Ring)

Sora/Riku VS. Goku/Gohan

Spidey VS. The Aliens (Yeah as in The Alien movie)

Popeye VS. Juggernaught

Old School Link VS. Subzero

Whoa that's cool O.O how do you find this game?

Wow that's pretty rad. I saw the Link one and the Homer vs Sephiroth one.

Hey heres funny video. It's a narrative blooper thingy through smash bros melee:
Super Smash Bros. Melee Bloopers