Mordecai and Rigby find a mysterious keyboard that allows them to do anything they want, including accidentally sending Skips to the moon.
Mordecai and Rigby get distracted while setting up chairs for a kid's birthday party and unleash a monster that terrorizes the entire park.
Mordecai and Rigby make a deal with a Coffee Bean to help them stay awake to work major overtime to pay for concert tickets.
Rigby learns an ultimate karate move and becomes the bully of the park.
Mordecai and Rigby throw Skips a surprise birthday party in order to get free cake.
After Rigby causes the guys to get locked in a meat locker, he must get help from some hot dogs in order to get them out.
Mordecai and Rigby lie about being astronauts in order to cut in line at a restaurant.
In order to impress Margret and ask her out, Mordecai hangs with a bunch of punk Unicorns who say they can help him get his lady.
Mordecai and Rigby try and prank the Master Prank Caller to be the best prank callers, but he sends them back to 1982.
Rigby's estranged accountant brother comes back to help save the park from an audit. While everyone loves Don, Rigby wants nothing to do with him.
After Rigby eats an excessive amount of junk food, his body quits on him, leaving him a ghost-like consciousness. Mordecai and Skips must find his body before the day is over.
After lying about having an awesome band, Mordecai and Rigby must get help from their future selves in order to learn how to play in time for the battle of the bands.
The surreal misadventures of two best friends - a blue jay and a raccoon - as they seek to liven up their mundane jobs as groundskeepers at the local park.