Suggestions by @leonardmoney

Chaos Emeralds

as Elements Of Harmony in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Dr. Eggman (Dr. Ivo Robotnik)

as King Sombra in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Iron Queen

as Queen Chrysalis in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Fiona Fox

as Cozy Glow in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Mephiles the Dark

as Lord Tirek in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Shadow the Hedgehog

as Lightning Dust in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Silver the Hedgehog

as Starlight Glimmer in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

N.I.C.O.L.E. the Holo-Lynx

as Princess Luna in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Blaze the Cat

as Princess Celestia in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Cream the Rabbit

as Fluttershy in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Rouge the Bat

as Rarity in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Amy Rose

as Pinkie Pie in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Sonic the Hedgehog (Character)

as Rainbow Dash in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Knuckles the Echidna

as Applejack in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Omochao

as Spike in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Miles "Tails" Prower

as Twilight Sparkle in Sonic The Hedgehog characters as My Little Pony: Friendship Is Magic characters

Nicholas Hoult

as Loid Forger in Spy x Family

Christopher Sabat

as Dio Brando in JoJo’s Bizarre Adventure (FUNimation Dub) - Phantom Blood/Battle Tendency

Dr. Eggman (Dr. Ivo Robotnik)

as Ian Hawke in Sonic The Hedgehog characters as Alvin and the Chipmunks characters

Proto Man

as Matthew Mercer in What characters would you like to hear voice actors voice?