Creating monsters out of crabs, conducting experiments with crabs, getting what he wants, and his pets
Sebastian escaping, his apprentice turning against him, not getting what he wants, his castle and electric waterwheel destroyed, not creating monsters out of crabs, and not conducting crab experiments
Powers and abilities
Has his electric waterwheel destroyed by Ariel after she threw a monkey wrench in it and swears retaliation on Sebastian.
"Where's the crab, Daniel? Talk! Or I'll turn you into a human crab. That better get me into the mad scientists hall of fame." "I know that crab had something to do with this. And if it's the last thing I ever do, I'm going to get that rotten little crustacean."
Dr. Vile is a mad scientist from The Little Mermaid series who tried to capture Sebastian and use him for his sinister crab experiments until Sebastian started bonding with his young good-hearted apprentice, Daniel in the episode; "Island of Fear." His electric waterwheel was responsible for polluting the ocean which caused everyone to fall sick until Ariel found a way to destroy it by throwing a monkey wrench at it.