kuromaru (mugen)
Infamous Mugen hentai character. It was an Dark-Skinned Giant Eyeball that can transform into various object or creatures in order defeat opponent by Raping opponent. Example: Wooden Horse, Tentacles, Slime, Dog, Drill and lot more.
After Kuromaru were releases to Mugen, Some of a character creator were started turning Mugen into a Hentai Fighting Game by making a dozens of hentai characters, Or converting other characters to compatible with Hentai moves.