Because you like Bowser in Super Mario Bros.
For Wreck It Ralph, it's not easy being the bad guy. Especially when you've been designed to destroy but really desire love. See them in Wreck-It Ralph.
Eugene H. Krabs is a greedy restaurant owner who won't let a dime out of the reach of his claws. See them in SpongeBob SquarePants.
Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.
There's nothing "demi" about this demigod's massive ego. See them in Moana.
As the hero of time, Link is reborn throughout history, always with the purpose of fighting and defeating the evil Ganon. See them in The Legend of Zelda.
Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.
Anger is a cantankerous hothead whose job is to get others riled up. See them in Inside Out.
When the safety of Hyrule is at stake, Princess Zelda does not hesitate to sacrifice herself for the good of the land. See them in The Legend of Zelda.
C is for cookie, and that's more than good enough for him. See them in Sesame Street.
Scar is sneaky, snarky, and always striving for more power. See them in The Lion King.
Lord Farquaad is a tiny man with big, evil aspirations. See them in Shrek.
A machete-wielding mass-murderer, Jason Voorhees is a terrifying blank slate. See them in Friday the 13th.