X-Men: Children of the Atom Cheats

At the character select screen, highlight Storm and wait roughly three seconds, then move Right, Down, Left, Left, Left, Left, Down, Right, Right. This brings you over the entire cast, stopping at Spiral. Following this, wait for three seconds, then press HP, LK and HK simultaneously.

If successful, Akuma will drop down instead of Spiral, then his mode will automatically be set to manual.

Highlight Spiral at the character selection screen, wait two seconds, then press Left until Iceman is highlighted. Wait two seconds, then press Right, Up, Right, Right, Down to highlight Silver Samurai. Wait two seconds then press HP + LK + HK.