Wet-Suit body, General Hawk head, lots of paint.
This one was done purely for laughs. He's basically a "Mud Trooper". His name is Pigsty, and he's a G.I.Joe Swamp Specialist who tends to get a little carried away with his work. He spends most of his time in the swamps of either the Florida Everglades or Cobra Island, spying on the Dreadnoks or Croc Master. Half the time the Joes have forgotten they've even sent him out there, but they're just as glad when he stays out there, because when he comes back to headquarters, he tracks mud all over the place. He counters the complaints by saying that the mud is just "his camouflage". I originally took a Wet-Suit body and a General Hawk head and painted them with a very thick brown paint. Somewhat more recently, I mixed up a glossier brown, to make it look like the mud was still wet, and added some miniscule plastic shavings to give it some texture. I think it was an improvement -- so to speak. Hope you enjoy the G.I.Joe Team's weirdest member. :)