Free Cake

Synopsis
Mordecai and Rigby try to seize an opportunity to eat a piece of cake, and it comes when they learn that Skips’ birthday is coming soon. But on the night of his birthday, Skips secludes himself in a forest instead of going to his party. Mordecai and Rigby try to bring Skips to the party, but they interrupt him while he's doing a spiritual dance. As it turns out, Skips had made a pact with the "Guardians of Eternal Youth", who were giving Skips the gift of immortality as long as he performed the spirit dance every birthday. Now that Mordecai and Rigby had broken Skips' pact, the Guardians kidnap Skips and are about to kill him. Now, the two must rescue Skips.

Summary
Rigby digs up a good-looking plate from the garbage, so he and Mordecai decide to use it by eating a piece of chocolate cake with it. When they try to buy cake mix at the grocery store, they believe the cake mix is too expensive (it was only $1.50), and try to find a free cake by going at a random wedding and attempting to get free cake at the 'free store', but their attempts fail. A piece of chocolate cake is available at the snack bar and they try to trick Benson into giving them the cake, but they will only get the cake if it’s either of their birthdays, which is not the case.

However, it is Skips’ birthday, but Benson and Pops tell them that Skips never had a birthday party and he secludes himself in the woods. Mordecai suggests that to throw a birthday party for Skips because he deserves it because he is always there for them (Rigby keeps on adding cake for suggestions). Benson agrees (only because Pops agrees), and commands the two to throw a party for Skips if they can get him on board.

In the house they keep on thinking how they are going to him on board. Rigby suggests to get a van and kidnap Skips. Mordecai disagrees and suggests that they should tell Skips that they want to throw a party for him. Rigby thinks that idea is lackluster because there will be no surprise (and no van). Mordecai said that they should throw Skips a surprise party.

They go to Skips and ask him if he wanted to hang out with them tonight, but Skips replies angrily he wants to be alone. Rigby said that they should lie to Benson, then figure out how to get Skips to the party later. Mordecai agrees telling Benson that Skips wants a surprise party at 8:00 at his house, and a giant chocolate cake. Benson gives them the key to the snack bar. As Mordecai and Rigby run to the snack bar, Benson shouts at them if they are lying to him, they have dish duty for the next month. They arrive at the snack bar and receives the cake.

Rigby wants to eat it right away, but Mordecai said they can't, or else they'll be punished with dish duty for a whole month. Rigby almost gives in by suggesting they do dish duty. Trying to find Skips by searching in the woods, Rigby's stomach starts to growl, being appetized by the cake he is holding. Mordecai keeps shouting not to touch the cake, but Rigby said it a medical emergency (even though he just ate a sandwich). Rigby interrogates Mordecai's medical experience, however Mordecai takes away the cake from Rigby while he rambles on.

At Skips' house, Benson ask Pops if they are there yet. Pops replies with no. Benson said to turn off the light because it is almost 8:00. When the lights turn off, Muscle Man all of the sudden gets undressed, Benson replying in disgust that it is not a stripper party. Back to the woods, Rigby grunts that it is almost 8:00, and at this point it is hopeless and that they should give up and eat the cake. Mordecai says that Benson will 'get pissed', but Rigby disagrees as usual, saying that it is better to have no regrets, takes the cake from his hand, and almost eats it. Mordecai and Rigby fight over the cake, almost ruining it. They hear a strange noise by some trees, and they find Skips doing an ancient ritual of some kind in the middle of the woods. When Rigby startles Skips, a ghost named Gary (perhaps voice acted by singer David Bowie) picks up Skips in his car and takes him away. Mordecai and Rigby manage to stow on.

Skips was performing an ancient eternal youth dance and is presented by baby gods who are angry with Skips for not completing the dance. They begin stealing his life and disintegrating him into dust, and in order to save him, Mordecai finds out that the baby gods love cake, offering their chocolate cake in exchange for Skips' life. At first, Rigby asks him what is he doing in anger, but eventually gives in, saving Skips' life. Mordecai, Rigby, and Skips are sent back and Skips’ birthday party starts. They give Skips their plate as a birthday present and Pops was able to get a spare cake, but unfortunately for the duo, the cake is vanilla with chocolate frosting.