What if Regular Show and Adventure Time existed in the same universe and the Regular Show characters dealt directly with the Mushroom War? This is told in my new series. In Part 1, Mordecai and Rigby encounter certain magical forces known in Adventure Time, leading up to the Mushroom War. In it, they struggle to overcome insanity from these new objects. *Will update regularly*

en este fanfic marceline se va de viaje por 3 años y por eso finn se siente muy solo ya que todos sus amigos estan ocupados y marceline era la unica con la que el podia estar (porque ella tiene mucho tiempo libre)y el piensa que empieza a sentir algo por ella, pero marceline vuelve antes de tiempo y el resto se los dejo en la historia

It's a normal day at the park, so why not a normal visit to the coffee shop? But what will happen when Rigby opens a portal to a strange new world called Ooo? How Mordecai, Rigby, Margaret and Eileen get home? Will they meet other people? Find out by reading!

Sequel to "Adventure Time and Regular Show Xover Extravaganza! After the events of the previous book, Finn, Jake, Mordecai, and Rigby must now find a way to return to their original bodies! Also, Rix the assassin has not yet given up on killing Beemo! Expect all the action from the prequel, and (maybe) even more! Also, you the readers voted, and the Destroyer of Worlds is coming!

If you think you've read great Adventure Time and Regular Show Crossovers, you ain't seen nothing yet! Enter the Multiverse to do battle with an ancient evil known as Kanzargon. Watch the cast of AT and RS fight this evil to save their worlds. This story includes epic battles, a little romance, more epic battles, and friendship. (Mostly epic battles!) 10 Chapters! Part 1!

what time is it it's HIGH SCHOOL TIME! With ROMANCE, HUMOR,SUSPENSE, EXCITEMENT, SWEET SONGS at the end. VIOLENCE AND MORE! some regular show reference's but whatever very awesome! Rated T for mild language and kissing scenes. Also don't forget to REVIEW when done reading.

there has been weird things happening around town and Mordecai, Rigby, Margaret and Eileen go investegate, only to end up in a straing and magical place. As they try to find they way back they come across some new friends?...

Go here for the title: my first fanfiction so I hope you all like it :) The models parents don't like them seeing eachother! Show jokes will be in here btw!

Fin, Jake, Riby, and Morticie meat

Maybe it was all a big mistake. They were never supposed to see each other again. Well then what happened? Is this what portals are supposed to lead to? Maybe, or maybe not. The very thin line they stand on could snap at any time. They could go back and not be remembered. Will they stay with their new families or leave and be together. Rated T for gore and mild violence.

Pen and JG have been friends for years, but what happens when, for the sake of trolling their fan bases, they pretend to be more than friends? CHAOS ENSUES! This is a parody and is a response to the AT episode All The Little People. Rated M for language, drug use, and eventual sexual content.

sequel to A.S. When Finn, Mordecai, Jake, and Rigby they get sent to Aaa, sperated and are blamed for many massacres. Can they clean their names and find each other? Can they work with the heroes who wants them died? Can they stop a evil force from destorying Aaa? And what is Nightmare and who does he work for? find out in Murders of Aaa.

The Door Lord had left them trapped in another dimension, with no means to get home. "What the 'H' happened!"

The Ice King was tired of getting the lump kicked out of him for stealing princesses across the land of Ooo. He decides to steal a 'princess' from another dimension and kid naps Margret and Eileen. It is up to Mordecai and Rigby to rescue them.

Benson is left hard and cold after the mushroom war. It didn't do him any good. He had to shoot down innocent men. That was 10 years ago. Now Benson must contain everything and work as a manager for a park, bottling up the war. When a daughter he never knew about comes back, he must be the best father a man can be. TEMPORARILY DISCONTINUED

In this update to the original 1977 series, three teams in the CN universe compete the events to win the gold, one team represents old CN, one team represents new CN, and the last team represent their villains. Join Lumpy Space Princess and Muscle Man as they serve as announcers to this crossover event that should be a reality!

Finn and Jake are sucked out of their own dimension and end up in who knows where.Curious aren't you? You going to have to read to find out.

The park and the entire city is being infested by zombies once again. Mordecai, Rigby and the rest of the gang now get help from a boy with a white bear hat and a yellow bulldog with magical powers. This is probably the first crossover where the characters don't know each other at all. Will they be able to save their beloved park? Read to find out!

From the first 2 Regular X-Men Show Stories. The Regular Show and the X-Men Gang are now travel to the Adventure Time Universe to find Deadpool. What will happen if they got there? Include OCS. T for Language, Violence, Sexual Themes, and Drug themes.

The gang are almost to Princess Bubble Gum find out how it goes! Oh and Part 3 Coming Real Soon... Only on Fan Fiction

Benson gives all the workers the summer off! But something weird starts happening and Mordecai and Rigby get transported to the land of ooo find out what happens

After four years, Finn comes back from a tour of adventure and Marceline is shocked at the way the human has changed. But trouble arouses when Finn accidentally makes Marceline ticked at him. But what happens when they finally make amends and Finn confesses his new love to Marceline? I don't own AT, RG, TAWOG, nor IZ. The songs belong to their owners.

A story of the U.C.F. cartoons one day fight and suddenly when all of them went back home, suddenly the Ice King stole the remote from the U.C.F officials. And teams up with every enemy from each others world. Luckily there was a spare remote and then the cartoons came back to stop him. Starring, Mordecai, Rigby, Gumball Watterson, Darwin, Finn, Jake, Milo, and Oscar.

Margaret and Mordecai getted stuck in the candy kingdom. Prince Gumball is hitting on Margaret and Mordecai is jealoussss Aw snap yo what's about to go down here? Find out by reading my first fanfic right here!

When Mordecai and Rigby are transport to the land of Ooo and can't find a way home things are bad. Coming to Ooo when the Lich returns things are worst. See what happens when Moderecai and rigby meets Finn and Jake to fight the Lich before he conquers Ooo