Some TMNT stuff was always meant for grownups.
Weasel was a mutant captured for experimentation by Go-Komodo's faction for experimentation. When Komodo is informed by his researchers that Weasel is not an anthropomorphic hybrid, but instead is a result of natural mutation, he orders Weasel released, as he is no longer of use. A doctor insists on keeping him for research on his healing capabilities, Komodo tells him to do so on his own time.
However, at this point, Weasel wakes up, and frees himself with claws that sprout from the back of his hand. Weasel protests his treatment, but is decapitated by Pimiko before he can attack.
- With his hairdo, powers, name, and "bubba" catchphrase, Weasel is a rather blatant parody of Wolverine.