This is AvX Deadpool.
Original download Mugen 1.0 only:
http://www.infinitymugenteam.com/Forum_345/index.php?topic=41523.0
Stage also available there, it works in WinMugen.
Now for Deadpool himself.
Patch files for WinMugen:
http://www.mediafire.com/?6rrvfv8cveyjz55
Enjoy~