This is AvX Emma Frost.
Original Mugen 1.0 only file:
http://www.infinitymugenteam.com/Forum_345/index.php?topic=41441.0
Stage also available if you want to get it, it works in WinMugen.
Now for Emma Frost herself.
Patch files for WinMugen:
http://www.mediafire.com/?acrm5zscjcc7c4c
Enjoy~