Suggestions by @leonardmoney

Idris Elba

as Knuckles The Echidna in Sonic The Hedgehog Cinematic Universe

Jim Carrey

as Dr. Ivo Robotnik in Sonic The Hedgehog Cinematic Universe

Ben Schwartz

as Sonic The Hedgehog in Sonic The Hedgehog Cinematic Universe

Tobey Maguire

as Sonic in Sonic: Hedge-Load

Jon Hamm

as Shadow The Hedgehog in Sonic The Hedgehog (2007 CGI Animated Film)

Tom Hardy

as Knuckles The Echidna in Sonic The Hedgehog (2007 CGI Animated Film)

Mark Hamill

as Dr. Eggman in Sonic The Hedgehog (2007 CGI Animated Film)

Mark Wahlberg

as Knuckles The Echidna in Sonic The Hedgehog (2007 CGI Animated Film)

Tobey Maguire

as Sonic The Hedgehog in Sonic The Hedgehog (2007 CGI Animated Film)

Shadow the Hedgehog

as Nicolas Cage in Characters you want famous actors to voice act.

Batman (Bruce Wayne)

as Nicolas Cage in Characters you want famous actors to voice act.

Raphael (TMNT)

as Nicolas Cage in Characters you want famous actors to voice act.

Knuckles the Echidna

as Nicolas Cage in Characters you want famous actors to voice act.

Silver the Hedgehog

as Dylan O'Brien in Characters you want famous actors to voice act.

Pennywise (It)

as Mark Hamill in Characters you want famous actors to voice act.

Donatello (TMNT)

as James McAvoy in Characters you want famous actors to voice act.

Sonic the Hedgehog (Character)

as James McAvoy in Characters you want famous actors to voice act.

Espio the Chameleon

as Simu Liu in Characters you want famous actors to voice act.

Pennywise (It)

as Voice Acting in Characters Who Mark Hamill Should Play/Voice

Doctor Octopus (Dr. Otto Octavius)

as Live-Action in Characters Who Mark Hamill Should Play/Voice