Ratchet & Clank: Up Your Arsenal Cheats

exploding jet enemy
on the first level when u start a new game, walk up to the rangers (those green robots) one of them will thro a grenade to kill both lazer thyranoids. continue up the trail and talk to the rangers. one of tham will give u a gun.
continue up the small trail and kill all 3 of thos lazer thyrranoids. kill the first thrrynoid jet thing and go down thru the hole. after u kill ed those pesky purple small things go right and youll see the second jet thing (dont kill it) walk under or around it and it'll explode its self!