It's probably just a M.U.G.E.N compilation with characters someone made based on RBO.
well anyhow I found this link feel free to try it & hope this the one u searching for
CODE
Video Preview: http://www.youtube.com/watch?v=3SK_ZlbatrA
Download link: [it's in the description box of the video, but I'll post it anyway]
www.zshare.net/download/rbof2-rar.html
credit goes to Ashe from Ratemyserver