Select customization mode and enter the shop. At the menu with the machines, machine parts, or miscellaneous items options, press Z, Left, Right, Left, Z, Y, X, Z, Left, Right, Left, Right, Z, X, Z, X, Z. If you entered the code correctly, you will hear a sound. The "Sounds Of Big Blue" option will now be unlocked for purchase at the shop. After buying it, highlight a Big Blue track in practice or time attack mode, then press L. Alternately, win all cups on the master difficulty setting to unlock the Remixed Big Blue Music at the shop.
Finish the the Ruby, Sapphire and Emerald Cups in first place on the standard or expert difficulty setting to unlock the Diamond Cup.
Finish the the Ruby, Sapphire and Emerald Cups in first place on the expert difficulty setting to unlock the Master Class.
Use your F-Zero GX License Card in F-Zero AX. Save the data that is unlocked to a memory card to unlock the Bahumut vehicle.
Successfully complete the game in story mode to unlock Dark Schneider (Deathborn's vehicle).
Successfully complete the game in story mode on the hard difficulty setting to unlock the F-Zero AX machine parts.
Finish a F-Zero AX arcade track in first place and save the data to a memory card. Unlock all the F-Zero AX tracks to unlock the AX Cup in Gran Prix mode.
Successfully complete story mode on the very hard difficulty setting to unlock the F-Zero AX racers.
Finish the AX Cup in first place to unlock the F-Zero AX Mute City - Sonic Oval track.
During a replay, press L or R to hear any previously unlocked character theme songs.
Quickly tap Left(2) or Right(2) to do an easier drift turn. Note: This cannot be done during a slide turn.
This works with almost every vehicle, but may not work with light vehicles such as the Twin Nortia, Blood Hawk, and Night Thunder. Select a heavy vehicle (Black Bull recommended), and put on Max Accel. settings. Then, at the start of the race, hold either L + Left or R + Right. After you go for a short distance and almost hit the wall, switch to the other direction. For example, at the start hold L + Left, then R + Right, and so on. You will get to speeds that not even non-stop boosting can keep up with. You can even complete Mute City (Twist Road) in 46 seconds (which beats the staff ghost by over 13 seconds).
Every time you plug in your memory card to play F-Zero AX, you will earn 20 tickets (just enough to buy a new AX machine).
On the lightning course when it does the walkthrough, the game shows a robot who is actually a Nintendo system named R.O.B. (robot operating buddy).
In story mode, second chapter, every time Samari Goroh gets hurt, your machine will spark.