The Origins of the Mighty Mutanimals!
Someone requested this after I posted the TMNT Adventures Hitler-punch scans. Over the course of the first 20 issues, the Turtles met a number of characters who eventually formed their own team (and short-lived spinoff book), the Mighty Mutanimals. As requested, here are their respective origin stories.
Man Ray: In TMNT Adventures #5, we meet marine biologist Jack Finney.
He spends most of the issue in the shadows, and thwarts Shredder's plot to destroy the Statue of Liberty (on the Fourth of July, no less!) before his big reveal:
Leatherhead: Everybody's favorite gator-man gets a vastly different origin this time around. TMNTA #6 introduces us to Jess Harley, a man from the bayou who steals a myserious crystal from swamp witch Mary Bones, then heads to New York to find a seller, only to drop the crystal down the sewer. He heads down to retrieve it...
Wingnut & Screwloose: In TMNTA #8, the Turtles return from competing in an intergalactic wrestling tournament to find a crazed bat-man and his mosquito sidekick smashing skylights across the city. They finally manage to capture them...
They're smashing skylights 'cause Wingnut thinks Krang's hiding under one of them, y'see.
Mondo Gecko: In TMNTA #18, the Turtles find a teenage metal band practicing in one of Shredder's old hideouts. Their playing causes a power surge that wakes up a bunch of souped-up Foot Soldiers, and the Turtles leap into the fray.
Jagwar & Dreadmon: These two are introduced in TMNTA #14 and #15, respectively, but they don't recount their origins until issue 2 of the "Mighty Mutanimals: Invasion From Space" miniseries: