The Lava Gun, a weapon previously used in Ratchet & Clank 2: Going Commando, has a different final upgrade than its Going Commando counterpart. Instead of the Meteor Gun, it upgrades into the Liquid Nitrogen Gun. This was done because of fan complaints that the Meteor Gun completely changed the way the original weapon, the Lava Gun, was meant to be used.

This was the only time that a weapon imported from a previous Ratchet & Clank game had been changed.