Sonic the Hedgehog (voiced once by Jaleel White, now voiced by Roger Craig Smith in English and Junichi Kanemaru in Japanese) is known as the world's fastest hedgehog. He loves to run, and likes danger. He is also great friends with Jaden and Jeffrey. His archenemy is Dr. Eggman, his best friend is Tails, and his girlfriend is Amy Rose.
Sonic is the title character of the Sonic Storm Adventures series.
- Sonic will guest star in Jeffrey, Jaden & Friends' Storm Adventures of Foster's Home for Imaginary Friends: Destination Imagination.
- Sonic will appear again in Jaden meets Inspector Gadget.
- Sonic is an old friend of the Good Fairy, as she is the one who gave Sonic the gift of his trademark speed.
- Sonic will meet Juniper Lee and her team in the eighth episode of the Juniper Lee's Adventures Series titled Super Smash Sister.