F-Zero GX Cheats

Unlock "Sounds of Big Blue"
In the customization menu, enter the following code in the F-Zero shop menu.

"Z Left Right Left Z Y X Z Left Right Left Right Z X Z X Z"

You should hear a soft sound. You can now purchase sounds of big blue at the F-Zero Shop item's menu for 99 tickets. To enable, when you select a Big Blue stage and press Z.