Suggestions by @stoc1000

Ben Kingsley

as Bowser in The Adventures Of Mario And Bowser

Score: -1

Brian Deacon

as Bowser in The Adventures Of Mario And Bowser

Score: -1

Charles Martinet

as Mario in The Adventures Of Mario And Bowser

Score: +2

Danny DeVito

as Sanic in Spangebab Crossover With Sanic

Score: 0

Tom Kenny

as Spangebab in Spangebab Crossover With Sanic

Score: +1

Colin Farrell

as Daddy in Colton Dvd 2020

Score: +1

Jacob Tremblay

as Colton in Colton Dvd 2020

Score: +1

Colin Farrell

as Dad in A Call With Grandpa And Grandma

Score: +1

Joe Johnston

as Grandpa in A Call With Grandpa And Grandma

Score: +1

Jon Ronson

as Grandpa in A Call With Grandpa And Grandma

Score: -1

Jillian Murray

as Grandma in A Call With Grandpa And Grandma

Score: +3

Jacob Tremblay

as Colton in A Call With Grandpa And Grandma

Score: +2

Jim Carrey

as Eggman in Sonic 1 Live Action

Score: +6

Ben Schwartz

as Sonic The Hedgehog in Sonic 1 Live Action

Score: +15

Jacob Tremblay

as Kid in Dig Your Grave Ringtone Music Video

Score: +1

Ryan Reynolds

as Metal Sonic in Sonic The Hedgehog: The Comic (Live Action)

Score: +1

Dwayne Johnson

as Knuckles in Sonic The Hedgehog: The Comic (Live Action)

Score: +3

Jason Momoa

as Shadow in Sonic The Hedgehog: The Comic (Live Action)

Score: 0

Jim Carrey

as Dr. Eggman in Sonic The Hedgehog: The Comic (Live Action)

Score: +2

Jacob Tremblay

as Tails in Sonic The Hedgehog: The Comic (Live Action)

Score: +3