Suggestions by @jesselee

Shrek (2001 Film)

as The Cylops in Slendytubbies

Cruella De Vil

as Cruella de Vil in Slendytubbies

Maleficent

as Maleficent in Slendytubbies

Jafar (Aladdin)

as Jafar in Slendytubbies

Captain Hook (Disney Character)

as Captain Hook in Slendytubbies

The Grinch

as The grinch in Slendytubbies

Starfire (Koriand'r)

as Starfire in Slendytubbies

Flik (A Bug's Life)

as Flik in Slendytubbies

Hopper (A Bug's Life)

as Hopper in Slendytubbies

The Grinch (Character)

as Grinch in Slendytubbies

Frankenstein's Monster

as Frankenstein in Slendytubbies

Killer Frost

as Killer Frost in Slendytubbies

Harley Quinn (Dr. Harleen Quinzel)

as Harley Quinn in Slendytubbies

The Joker (Character)

as The Joker in Slendytubbies

The Penguin (Oswald Cobblepot)

as The Penguin in Slendytubbies

Lex Luthor

as Lex Luthor in Slendytubbies

The Riddler (Edward Nigma)

as The Riddler in Slendytubbies

Mr. Freeze (Dr. Victor Fries)

as Mr. Freeze in Slendytubbies

Batman

as Batman in Slendytubbies

Eagly

as Eagly in Slendytubbies