Suggestions by @bradenbaum

Michelle Williams

as Zecora in My Little Pony: Friendship is Magic

Score: +2

Michelle Williams

as Twilight Velvet in My Little Pony: Friendship is Magic

Score: +1

Michael B. Jordan

as Shining Armor in My Little Pony: Friendship is Magic

Score: +2

Riley Keough

as Princess Celestia in My Little Pony: Friendship is Magic

Score: +1

Rebecca Romijn

as Princess Luna in My Little Pony: Friendship is Magic

Score: +1

Johnny Depp

as Planton Jaxeon in My Little Pony: Friendship is Magic

Score: +1

Ben Affleck

as King Sombra in My Little Pony: Friendship is Magic

Score: +1

Ben Stiller

as Discord in My Little Pony: Friendship is Magic

Score: -1

Jordyn Ashley Olson

as Fluttershy in My Little Pony: Friendship is Magic

Score: +1

Rebecca Ferguson

as Rarity in My Little Pony: Friendship is Magic

Score: +1

Nicole Byer

as Applejack in My Little Pony: Friendship is Magic

Score: +2

Ashley Benson

as Pinkie Pie in My Little Pony: Friendship is Magic

Score: +2

Emmy Rossum

as Starlight Glimmer in My Little Pony: Friendship is Magic

Score: +2

Jason Drucker

as Spike in My Little Pony: Friendship is Magic

Score: +3

Cynthia Addai-Robinson

as Rainbow Dash in My Little Pony: Friendship is Magic

Score: +1

Elliot Page

as Twilight Sparkle in My Little Pony: Friendship is Magic

Score: -1

Sally Martin

as Sarafina in The Lion King Twisted

Score: +3

Isabelle Cornish

as Uru in The Lion King Twisted

Score: +4

Sammy Sheik

as Ed in Welcome to our World

Score: 0

Tom Holland

as Banzai in Welcome to our World

Score: -3