Crash Bandicoot: The Wrath Of Cortex Cheats for GameCube
Enter 'wombat' (without the quotes) as a name when you start a new game to unlock everything including the secret level accessed by Time Relics
This secret mini-game becomes an available option on a Game Boy Advance when you link it to the GameCube 'Crash Bandicoot: The Wrath of Cortex' game.
Complete the game and collect all 46 gems
It's simple really, but just load a new file and wnter your name as WOMBAT. You will have everything unlocked, and 106% completion! (This is great if you're stuck on an area and want to see what awaits you.)
Collect all the gems in the game. There are 46 gems in all to collect to see an alternative ending.