Adventures of Sonic the Hedgehog
The speediest hedgehog around teams up with his best friends to stop his arch nemesis Dr. Robotnik from enslaving the population of Planet Mobius.
Transformers: Animated (Tubi link)
The Decepticons have appeared in Detroit, and it's up to the Autobots to stop Megatron and his evil plans!
Sonic X (Plex link)
A slight malfunction causes Chaos Control, and sends Sonic the Hedgehog to Earth. While there, Sonic meets Chris Thorndyke, who aids at collecting the Chaos Emeralds, so Sonic and friends can go home.
Astro Boy (1980)
A Pinocchio-like figure becomes a publicly renowned superhero complete with laser-firing fingers, uncanny hearing, and jet-powered boots.