Ratchet and Clank: Up Your Arsenal Miscellaneous Codes -

Ninjas and Pirates mini game:
When you play the Qwark Vid Game, instead of selecting a game, press and submit the password _MEGHAN_. REMEMBER: "_" indicates a space. Press and you will be transported to the Insomniac Museum where you can play a two player game featuring ninjas and pirates.

Bomb mini-game:
When you play the Qwark Vid Game, instead of selecting a game, press and submit the password YING_TZU. REMEMBER: "_" indicates a space. Press and you will be transported to the Insomniac Museum where you can play what appears to be a four player game. The four players are at the four corners of a square room, with pillars in it. You go around and drop bombs trying to kill everyone.]

Sketchbook:
Finish the game to unlock the "Sketchbook" option at the "Cinematics" menu. Press or to move through the pictures.