Regular Show: Dumped at the Altar/Garage Door/The Power/Just Set Up The...

The guys have to get Muscle Man married./Mordecai and Rigby have to fix the garage door./When Mordecai and Rigby bust a hole in the wall they must fix it before anyone finds out. They decide to do this using a mysterious keyboard that allows them to/Mordecai and Rigby try to set up the chairs for a party to prove that they aren't slackers, but they find a video game called 'Destroyer of Worlds