X2: Wolverine's Revenge
Level select and all challenges:
Press B, X, B, Y, B, X, L, R, Z at the main menu.
Note: There are two side effects after using the level select cheat. First,
stealth attacks no longer give you dog tags, which means you cannot advance to
a higher strike level. Get all the tags you need before using the cheat.
Secondly, when you save a game in which the level select code is used, the file
is now marked with an "X" just before the time and date.
Press B, X, B, Y(3), L(2), Z at the main menu.
All Cerebro files and FMV sequences:
Press B, X, B, Y(3), R(2), Z at the main menu.
Press B(2), X(2), Y(2), X(2), L(2), R(2), Z at the main menu. Pause game play
to access the "Cheats" option.