Tunnel Rat is a fictional character from the G.I. Joe: A Real American Hero toyline, comic books and animated series. He is the G.I. Joe Team's Explosive Ordnance Disposal specialist and debuted in 1987.
So basically this is gonna be sorting fictional characters into groups/teams/associations of any sort they were apart of during their respective canon. Make sure to clarify for teams with multiple incarnations in different media which one you’re talking about.
