I found this while searching for Mugen videos on Youtube. The link explains everything but if you'd rather learn what you're getting into first:
Suika is the final boss from a Japan-only game called "Tohou Suimusou." She's a drunken loli demoness whose final attack, "Great Oni Missing Purple Power," maker her grow to twic her size. And someone's made her giant form into a fighter for Mugen! The movie shows her beating the living snot out of three notoriously cheap opponents: Broli, Evil Ken, and Abyss.
If you're a Mugen player and you want to download Suika, here's a direct link to the downlload page:
http://www.geocities.jp/gs_black_lak...a/mpsuika.html