some characters
Mewtwo: win with pikachu and jigglypuff in adventure (normal to be sure)
Blue: win with blade on adventure normal
Crono: clear 3minute multiman
Cloud: clear 100 multiman
Luigi: win with mario on adventure (normal to be sure
Super Sonic: win with sonic on adventure very hard
Shadow: win with knuckles and tails and sonic on adventure
Lloyd: i won it with mario on normal so test it
Hope that helped.