Night Owl

The Night Owl is a one-time character, showing up in "The Night Owl". He appears as a young man with brown hair and colored sunglasses, and is the owner of a radio station. In the episode, the Night Owl holds a contest over the radio waves, offering a vintage muscle car for the last person standing on top of a giant billboard. Once he learns that the remaining contestants, Mordecai, Rigby, Muscle Man, and High-Five Ghost, plan to share the car together, he freezes them using liquid nitrogen, all after fooling them into fighting each other in order to preserve his popularity forever.

By the year 4224AD, the Night Owl is monumentally famous, having a museum which was built around the contest and having his head and mind preserved in an owl-shaped robotic body. Once Mordecai and the gang unfreeze, they take the muscle car to the time machine exhibit that the Night Owl built in his own museum, only to be stopped by the Night Owl himself. The gang, however, ran his robot over which made his head fall out and took the time machine to the very first day of the contest, stopping the Night Owl's contest for good.

Apearence
He has brown hair, blue sunglasses, pink jeans, and wears a Night Owl t-shirt.

Trivia

 * The sunglasses that the Night Owl wears is identical to the pair that Low-Five Ghost wears.
 * Night Owl fans are called "Hooter-Heads."
 * The Night Owl is probably in college, since "I maxed out his student loans for that car"