The troll is a one-shot villain in Wander Over Yonder.
It is a small green humanoid that feeds the offenses caused by his insults. When this happens he grow larger thus turning him a dangerous giant. He only has one weakness; if the people who tries to offend ignore his insults he shrinks. Insults his opponents until they are enraged which makes him grow larger, once there is a response. He shrinks when his insults are ignored.
While visiting Baaaaa-halla, the Prince Cashmere and Ram Guards's planet, Wander and Sylvia encounter this mean and greedy troll who's been trying to steal the food for the big feast Prince Cashmere and his companies are holding. The troll insults the Ram Guards and every time he does so, he gets bigger and stronger, so he combats the goats with ease. Sylvia is determined to help the Ram Guards fight the creature, but Wander doesn't help the right way and sits out, making the fight worse, but it might be helpful. Sylvia also ends understanding what makes stronger to the troll and takes example of his friend. Finally, Cashmere and the Ram Guards understand that their offenses is that make stronger to the troll and ignores him insults, thus making the troll shrank until dissapear.
- This troll is a reference to virtual trolls; when Cashmere asks Wander and Sylvia why aren't they doing nothing to stop troll, Sylvia answer that getting him and the rest of Ram Guards upset makes him stronger and Wander suggest "Don't feed". It is the same moral that says it musn't feed virtual trolls.