easier
While your fighting the Protopet Boss at the protopet HQ, you can stay on the second floor by using your tractor beam to hit him with one of the bombs.
He won't trash the floor but he will start to come after you.
P.S. You should use the bombs these will do the most damage
We have more cheats and tips for this game here, Ratchet & Clank: Going Commando cheats
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