Successfully complete the game to unlock the levels in free mission mode.
Select the "Internet" option, then choose the "Passwords" selection. Enter "25193621" to unlock the YF-21 in free mission mode.
|Master Code First (Must Be On) [Note 1]||9C5D88F8|
|Master Code Last (Must Be On) [Note 2]||245EECA9|
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.