Sling

Sling slipped into the wild, wonderfully weird world of Archie's Teenage Mutant Ninja Turtles Adventures in 1989, right at the height of the Copper Age's anything-goes creativity. With only eight catalog appearances spread across TMNT Adventures, Mighty Mutanimals, and a special invasion-themed one-shot, this is a character for the dedicated explorer of that era's more obscure corners. Sling keeps remarkable company — sharing pages with Leonardo, Raphael, Donatello, and the gloriously strange Cudley the Cowlick and Stump — which tells you something about the gloriously offbeat corner of the TMNT universe they inhabit. If you love the Archie run's reputation for pushing beyond the cartoon into genuinely strange, ambitious storytelling, tracking down Sling's handful of appearances is exactly the kind of deep-cut hunt that makes collecting so rewarding.