Because you like Krusty The Clown in The Simpsons

A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..

The self-described "ghost with the most" knows the ins-and-outs of specter life like no other. Just ask him. See them in Beetlejuice.

Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.

A machete-wielding mass-murderer, Jason Voorhees is a terrifying blank slate. See them in Friday the 13th.

The Grinch's heart is just too small to appreciate Christmas. See them in Dr. Seuss' How the Grinch Stole Christmas.

Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.

Born and raised in the darkness, Bane is determined to have the city totally under his control so that he can demolish it. See them in DC Extended Universe.

Trevor Phillips is an unpredictable maniac who tortures people for no reason. See them in Grand Theft Series.

Thanks to the contributions of this 14-year-old, the world is only occasionally destroyed by his grandfather. See them in Rick and Morty.

A company man who has never done a day of work, Creed Bratton pursues sketchy extracurricular activities that keep him busy. See them in The Office.

Danny Zuko's car is auto-matic. Its system-matic. Its hyyyyydro-matic. Why, its greased lightning! See them in Grease.

How lucky are we that Arthur Curry, the King of Atlantis, hasn't taken over the surface world? Very! See them in DC Extended Universe.