Unidentified farting objects

When Darren Stonkadopolis claims he's had a close encounter of the stinky kind, the other Fart Squad members think he's full of hot air. But then the alien Stink Weeds descend, and the Fart Squad is forced to smell the truth. It'll take some weed whacking, some stealthy stench tactics, and buttfulls of gas so smelly they'd make the sun blush to stop these mutant extraterrestrial vegetables from universal stinkination.