Sonic and the Turtles ROLL OUT (1999)

This would have come out in the late 90s

Sonic and his team where on the search for his mother Aleena to win back Mobius when a strange portal took them to another world known as Earth! On Earth, the heroic Teenage Mutant Ninja Turtles were celebrating both the new millennium and the 5-year anniversary of finally defeating Shredder when there was a sighting of a blue spiky alien, which was Sonic. The turtles went to investigate when they were attacked by jets that turned into robots, known as the Decepticons! Sonic and Tails gave them a hand, and all six of the heroes' actions were futile until the selfless Autobots came to the rescue. As they make the triple alliance of the end of the century, little do they know that Shredder, Krang, and their evil mutants Bebop and Rocksteady, had survived! And Krang's alliance with Megatron and Robotnik has enabled him to create an army of millions upon millions of transforming Technodromes! But it seems there is more to Megatron and Krang's alliance than meets the eye.