While playing a game, press White, Black, White, Black, Y2, B, X2, B, R2. The locations of hidden Opals, Bilbies, Golden Cogs, Rainbow Scales, and Thunder Eggs will be shown with colored lines from the sky Opals and Rainbow Scales with a green line, Golden Cogs with a gold line, Thunder Eggs with a purple line, and Bilbies with a whitish line.
Aquarang, Elemental Boomerang, Dive, and Swim abilities
While playing a game, press White, Black, White, Black, Y2, X2, Y, X.
While playing a game, press White, Black, White, Black, Y3, X, Y, X.
Successfully complete the game with all cogs, eggs, and opals collected for a 100 completion to unlock a bonus level and an extra FMV sequence after the ending credits.
Collect ten golden cogs to unlock the Zoomerang.
Collect twenty golden cogs to unlock the Multirang.
Collect thirty golden cogs to unlock the Infrarang.
If you have the Multirang and have to fight a group of Frills, run around in circles while throwing all of your boomerangs at once.