Metal Sonic made his first appearance in Sonic CD for the Sega CD.
But then, Dr. Robotnik will make an even better, more improved version once he gets back to the real world.
If Metal Sonic isn’t in the sequel, I’ll eat my Sonic hat.
I’m thinking that when Metal Sonic makes an appearance in the movies, it will be a cobbled together version from the resources in the Mushroom Hill Zone.