After beating Drek, go to the Goodies screen and do the following moves:
Flip Back, Hyper-Strike, Comet-Strike, Double Jump, Hyper-Strike, Flip Left, Flip Right, Full Second Crouch.
Big Head Mode For Enemies
After beating Drek, go to the Goodies screen and do the following moves: Stretch Jump, Flip Back, Flip Back, Flip Back, Stretch Jump, Flip Back, Flip Back, Flip Back, Stretch Jump, Flip Back, Flip Back, Flip Back, Full Second Crouch.
Big Head mode for NPCS
After defeating Drek, go to the goodies menu and do the following sequence:
Flip left, Flip Right, Flip Back (x3), Comet-strike, Double Jump, Comet-Strike, Hyper-strike.
Big Head mode for Ratchet
After defeating Drek, go to the goodies menu and do the following sequence:
Flip Back (X3), Full Second Crouch, Strecth Jump and a Full Second Glide.
Miscellaneous Cheats
NOTE: To activate the cheats, you must have defeated Drek. Then, do one of the needed combos at the 'Goodies' menu to gain the cheats' trigger (i.e make the cheats work).
Invincibility (temporary only):
Press Comet-Strike[4], Flip Back, Full Second Crouch, Flip Back, Full Second Crouch and Comet-Strike[4]. You will gain half a minute of invincibility whenever a Life Blue ball is collected. It can only be done when health is at full.
Mirrored Levels:
Press Flip Left[4], 3-Hit Wrench Combo, Hyper Strike, Flip Right[2], Double Jump, Flip Right[2], Double Jump and Full Second Crouch.
Trippy Contrails:
Press Wall Jump[10], Double Jump and Hyper-Strike. You should see an effect behind you during rail slides if done correctly.