Have a saved game file from Ratchet And Clank Future: Tools of Destruction to get a discount when purchasing the Negotiator, Buzz Blades, Mag-Net Launcher, Mr. Zurkon, and Groovitron Glove at the store.

Have a saved game file from Ratchet And Clank Future: Quest For Booty to get the Pirate Hat for Ratchet at the "Community" screen.