The Ninja Turtles of an alternate dimension, also known as the "Nega-Turtles", is a trio of mutant turtles who function as a ninja clan. They are taught by Hamato Yoshi, a human-born mutant rat.
History[]
In this parallel world, Michelangelo was never mutated. Without the Turtles' heart, Hamato Yoshi, who was already beginning to spiral into despondence and depression, continued down that path and raised the three remaining Turtles as a more malicious, hard-lined ninja clan. They were awarded a home in the sewers by New York City's mayor, Shredder, but they secretly plotted to overthrow him in order to install Yoshi as the city's leadership.
After Michelangelo had another incident of feeling underappreciated, he began to wish he'd never been mutated. He tripped over a magic ring on his skateboard, which housed a Genie that granted his "needed" wish, transporting him to this world where he was not around. Michelangelo came across Hamato Yoshi, confusing him for his Splinter. Yoshi assumed him to be an impostor of his students and attacked him.
Michelangelo ran away, but was cornered by this world's Turtles. They also attacked him, and as he tried to reason with them and draw some information out of them, they ended up knocking him out. Michelangelo returned to his world, with his lesson learned. Genie in a Bauble, Baby!