YF-21
To unlock the YF-21 in free mission mode select the "Internet" option, then choose the "Passwords" selection. Use "25193621".

Free mission mode
To unlock the levels in free mission mode finish the game.

Game Shark Code List

Master Code First (Must Be On) [Note 1]	9C5D88F8
Master Code Last (Must Be On) [Note 2]	245EECA9
Infinite Shield	B6BFD6E400000064
Infinite Time	8B6DD2EB43323BA3
Max Score	F4352E0505F5E0FF

Note 1: This code must be the first code in the list of Game Shark codes entered for this game.

Note 2: This code must be the last code in the list of Game Shark codes entered for this game. If more codes are entered after this code, then this code must be deleted and moved to the bottom of the list of Game Shark codes for this game again.