Sonic Underground

Characters: Sonic the Hedgehog(he's the older sibling of Manic and Sonia, but he's shorter than Manic and the same height as Sonia, if not slightly taller), Manic the Hedgehog(he's the youngest of Sonic and Sonia, but he's a little taller than Sonic and Sonia) Sonia the Hedgehog(she's the middle of Sonic and Manic, she is the same height as Sonic, if not slightly shorter) Tails Prower, Knuckles the Echidna, Amy Rose, Shadow the Hedgehog, Rouge the Bat, Cream the Rabbit, Big the Cat + his best friend Froggy, Vector the Crocodile, Espio the Chameleon, Charmy Bee, Silver the Hedgehog, Blaze the Cat, Jet the Hawk, E-123 Omega, Ray the Flying Squirrel, and Mighty the Armadillo.