Darklon came along around the time I was getting out of collecting G.I. Joe, so I'm not sure if I ever had his toy.
I'm not even sure what a "Darklon" is...
That, combined with his "distant cousin of Destro" status, suggests that Darklon was planned to have a more important role, but that never played out. Which is a shame because he's got a very unique look to be a simple vehicle driver.
For Darklon, I used a Guardians of the Galaxy - Sakaaren Commander Heroclix. That guy's pose is perfect for a villain.
I had picked up that miniature as a possible Cobra Commander, but once saw the weird alien face, I switched it to Darklon.