who are the 4 psp only characters?

who are the 4 psp only characters?

Cable, Xman, Cannonball and don't know the fourth

Dark phoenix

i wished polaris was in the game, different yet similar powers as magneto

There is already a thread for all this................

http://www.killermovies.com/forums/showthread.php?s=&threadid=320672&perpage=20&highlight=&pagenumber=1