Suggestions by @jesselee

"Honest" John Worthington Foulfellow

as Honest John in Bunsen Is a Beast

Monstro

as Monstro in Bunsen Is a Beast

Lampwick

as Lampwick in Bunsen Is a Beast

Anastasia Tremaine

as Anastasia Tremaine in Bunsen Is a Beast

Carnage (Cletus Kasady)

as Carnage in Bunsen Is a Beast

Ursula (Disney)

as Ursula in Bunsen Is a Beast

Grigori Rasputin (Anastasia)

as Rasputin in Bunsen Is a Beast

Professor Padraic Ratigan

as Ratigan in Bunsen Is a Beast

Fat Cat

as Fat Cat in Bunsen Is a Beast

Drizella Tremaine

as Drizella Tremaine in Bunsen Is a Beast

Magic Mirror

as Magic Mirror in Bunsen Is a Beast

Galactus

as Galactus in Bunsen Is a Beast

Doctor Victor von Doom

as Doctor Doom in Bunsen Is a Beast

Old Hag

as Old Hag in Bunsen Is a Beast

Green Goblin (Norman Osborn)

as Green Goblin (Norman Osborn ) in Bunsen Is a Beast

Stromboli

as Stromboli in Bunsen Is a Beast

FAKE

as Madame Mim in Bunsen Is a Beast

Shere Khan

as Shere Khan in Bunsen Is a Beast

Lady Tremaine

as Lady Tremaine in Bunsen Is a Beast

Yzma

as Yzma in Bunsen Is a Beast