... its a joke on street fighter, strip fighter IV has no predecessors...
This is incorrect, semi-unfortunately. SudioS' Strip Fighter IV is actually based on an old PCEngine game called Strip Fighter II by Games Express, which was in turn a parasite riding on Street Fighter II's coattails. Games Express did a whole series of these, actually, including titles such as Body Conquest (Dragon Quest), Hi-Leg Fantasy (Final Fantasy) and Lady Sword, which I've never played but I guess it's supposed to be an ero Wizardry parody or something.
But back on topic, Strip Fighter II. Have some screenshots.
See some familiar faces? The fact of the matter is that the game really was horrible and most of the characters have had StudioS makeovers that make them far more appealing. Medusa was really the only memorable character in the original, although I found the fact that Amanda kept her spinning-boobs-of-death attack particularly hilarious.
If any particularly brave or masochistic folks are interested, I've hunted down a ROM and an already-cracked emulator and tossed them up on MegaUpload for your... I hesitate to say enjoyment, really. I played this ages ago before I'd really discovered Ryona, but it was bad even back then. I guess it's at least worth a laugh or two before going back to the StudioS remake. =p
Anyway, here it is.
http://www.megaupload.com/?d=JMHQ5LP6