Shadow the Hedgehog (Voiced by David Humphrey, Jason Griffith and currently voiced by Kirk Tornton in English and Koji Yusa in Japanese) is a black and red hedgehog and is Sonic's rival. Shadow was created by Gerald Robotnik to be the "Ultimate Life Form" in order to cure Maria Robotnik's illness.
- Shadow will guest star in Jaden meets Inspector Gadget.
- Shadow will appear again in Ultimate Lifeform Version II.
- In the Thunderbolts Adventure Series, Shadow is Courtney's Master who is teaching her how to use Chaos Control. Courtney also reminds him of his old friend; Maria Robotnik.
- Shadow is good friends with Paul.
- Shadow will return in Jeffrey, Jaden, Hiccup & Juniper Lee's Storm Adventures of My Little Pony: Friendship is Magic - To Where and Back Again.
- He now works For G.U.N the same one who Shot Maria