Original URL: http://www.psxextreme.com/ps2-cheat-print/171.html
Ratchet and Clank

Do the following after defeating Drek and entering the goodies screen and perform:

Big Head (Clank) 

Flip Back, Hyper-Strike, Comet-Strike, Double Jump, Hyper-Strike, Flip Left, Flip Right, Full Second Crouch. 

Big Heads (Enemies) 

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 (Supporting Characters) 

Flip Left, Flip Right, Flip Back, Flip Back, Comet-Strike, Double Jump, Comet-Strike, Hyper-Strike. 

Big Head (Ratchet) 

Flip Back, Flip Back, Flip Back, Full Second Crouch, Stretch Jump, Full Second Glide 

Full Health Gives Temporary Invincibility 

Comet-Strike (4 times), Flip Back, Full Second Crouch, Flip Back, Full Second Crouch, Comet-Strike (4 times). 

Mirrored Levels 

Flip Left, Flip Left, Flip Left, Flip Left, 3-Hit Wrench Combo, Hyper Strike, Double Flip Right, Flip Right, Flip Right, Double Jump, Full Second Crouch. 

Trippy Trails 

Wall Jump (10), Double Jump, Hyper-Strike.