Suggestions by @diger

Idris Elba

as Knuckles in Sonic The Hedgehog 3

Score: +1

Jason Griffith

as Shadow The Hedgehog in Sonic The Hedgehog 3

Score: -2

Cree Summer

as Blaze the cat in Sonic The Hedgehog 3

Score: +1

James Marsden

as Tom Wachowski in Sonic The Hedgehog 3

Score: +2

James Mardson

as Tom Wachowski in Sonic The Hedgehog 3

Score: -2

Cindy Robinson

as Amy Rose in Sonic The Hedgehog 3

Score: 0

Mel Gibson

as Gerald Robotnik in Sonic The Hedgehog 3

Score: 0

Jim Carrey

as Robotnik/Eggman in Sonic The Hedgehog 3

Score: +2

Tika Sumpter

as Maddie Wachowski in Sonic The Hedgehog 3

Score: +2

Ben Schwartz

as Sonic in Sonic The Hedgehog 3

Score: +2

Ellen McLain

as GLaDOS in Portal: The Movie

Score: +1

Stephen Merchant

as Wheatley in Portal: The Movie

Score: +1

Danielle Campbell

as Chell in Portal: The Movie

Score: +1

Ben Schwartz

as Sonic.Exe (Voice) in Friday Night Funkin' The movie

Score: 0

Cree Summer

as Tails in Sonic.EXE The Movie

Score: -1

Jim Carey

as Eggman in Sonic.EXE The Movie

Score: +1

Roger Craig Smith

as Sonic in Sonic.EXE The Movie

Score: +2

Hoyeon

as Monika in Friday Night Funkin' The movie

Score: 0

Karan Brar

as Nonsense in Friday Night Funkin' The movie

Score: +1

Erica Lindbeck

as Vanny/Vanessa in Five Nights At Freddys The Series

Score: +1