Ty the Tasmanian Tiger Cheats

During gameplay, press:
L,R,L,R,Y(2x),X,B(2x),X,Z(2x)

This will bring up the item locations, giving you different colored lines leading to the location of that item.

NOTE: You must be loking a specific way at the horizon to see them.

Yellow Line: Cog
Green Line: Opal
White Line: Bilby
Purple Line: Thunder Egg