We all know that we found out that there's gonna be a live action/3D animated Sonic the Hedgehog movie in 2018, but we all think that Ben Stiller should voice Knuckles the Echidna/Super Knuckles and Metal Knuckles in the live action/3D animated Sonic the Hedgehog movie, since Alex the Lion's voice in the Madagascar movie series. When do we want Ben Stiller cast as the voice behind the red echidna (not the 1 from Sonic Boom)? 2018! Sign this petition if you want him cast as Knuckles's voice in the 2018 live action/3D animated movie.