Because you like Tintin in The Adventures of Tintin

Green skin, pointy hat, evil cackle—this villain has it all! See them in The Wizard of Oz.

A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.

Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.

Both a noble district attorney and a psychopathic villain, Harvey Dent proves some men really can have it all. See them in DC Extended Universe.

Mr. Fox will never truly be happy without a dead chicken between his chompers. See them in Fantastic Mr. Fox.

Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.

Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.

In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.

Johannes Betzler is an overwhelmed little boy caught up in deeply confusing times. See them in Jojo Rabbit.

Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.