You figure you may as well revisit those random codes you were thinking about trying before Pal3000 rudely distracted you earlier. You input the code 245 and test it out on one of the default RAYGUNS.
You make the HERBICIDE GUN! It squirts out 2,4,5-Trichlorophenoxyacetic acid, an herbicide that was one of the main components in AGENT ORANGE. You haven't seen any plants in here, but you reason that most herbicides are still pretty harmful to living creatures in large doses, so maybe it'll still come in handy?