To unlock the AX machine parts, beat Story chapters on the Hard difficulty.
Beat the Story Mode chapters on Very Hard to unlock AX Pilots.
To unlock AX Tracks, get first in AX Machine Tracks or beat all the grand prix on Master.
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To unlock the Dark Schneider, beat all of the chapters in Story Mode.
To unlock the Diamond Cup, come in first place in the Ruby, Sapphire and Emerald Cups (on Standard or Expert).
To unlock Master Class, come in first place in the following Cups on Expert: Ruby, Emerald and Sapphire.
To unlock the AX Mute City Sonic Oval, beat the AX Cup.
In the F-Zero GX Shop, enter X, X, X, Y, X, X, X, Y, Z, Z, LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT
Enter the F-Zero Shop under the Customization menu. Go to the screen where you can buy machines, machine parts, and items, and enter the following code useing the digital pad and buttons:Z, LEFT, LEFT, LEFT, Z, Y, X, Z, LEFT, RIGHT, LEFT, RIGHT, Z, X, Z, X, Z.
You can do it slowly. When entered correctly, you will hear a chime. You can now buy “Sounds of Big Blue” in the shop for 99 tickets.
To activate this easter egg, hit Z after highlighting any Big Blue track (in Practice or Time Attack).
You can also unlock the “Sounds of Big Blue” by beating all cups on Master difficulty.
Agenthawk333 offers an alternate code: Z, LEFT, RIGHT, LEFT, Z, Y, X, Z, LEFT, RIGHT, LEFT, RIGHT, Z, X, Z, X, Z.
