A girl called Patty arrives at Mario and Luigi's claiming to be an orphan without a family or a place to go, so the plumbers invite her in for a stay. Mario becomes the King of Cramalot in order to drive out Koopa's forces. Episode is based on The Sword in the Stone. Featured song: Bad (Michael Jackson) The Super Mario brothers are spoiling Patty, when her parents show up, ashamed that she's been taking the plumbers for granted, but they enjoy a family reunion.
In Marianne & Luigeena, Lyle is invited to a lunch with the Mario Bros, but their sisters are also coming, while in Mario's Magic Carpet, the sultan makes Mario, Luigi and Toad into slaves while he sells the Princess which only a magic lamp can save them.
Mario and Luigi help a certain Mark Twang win a riverboat race against Koopa. Featured Song: Proud Mary (Creedence Clearwater Revival) Dr. Frankenstein asks Mario and Luigi to help him with his experiment in promising his monster a normal brain. While laying down to take a nap, Mario gets caught up in the experiment and his brain gets switched with the monster's.
Our heroes think they are going to a benefit Spaghetti Dinner at the Linguini Empire Colosseum, but it's all a plot by the evil Emperor Augustus Septemberus Octoberus Koopa to feed the Marios to the lions.
Mario and Luigi trade Princess Toadstool's cow for garbanzo beans. The beans grow into a beanstalk, leading the group to a castle in the sky owned by a giant Koopa. Episode is based on Jack and the Beanstalk. Featured song: I Heard it Through the Beanvine (a slightly altered version of I Heard It Through the Grapevine) (Marvin Gaye) A vampire (Jim Ward) arrives from Transylvania as a foreign exchange student.
Mario's group enter a castle in Turtlevania, where Koopa and his minions are all monsters. Episode is based on Count Dracula. Featured song: Thriller (Michael Jackson) Magician Harry Blackstone Jr. visits Luigi.
Romano and Joliet are unable to get married due to the feud going on between their fathers, which Koopa secretly started. Episode is based on Romeo and Juliet. Featured song: That's Amore (Dean Martin) A schemer (Vic Dunlop) in order to get rich quick pretends to be Mario and Luigi's missing brother.
Koopa and Fryguy use a fake volcano god to trick a tribe of islanders into sacrificing Princess. Featured song: Hot Hot Hot (Buster Poindexter) Luigi buys a watch that runs backwards from a mysterious salesperson. Soon, he does everything backwards, even eating.
After eating Super Sushi, Koopa has grown enormous, and is terrorizing the city of Sayonara. Episode is based on Godzilla. Featured song: The Jolly Green Giant (The Kingsmen) Mario and Luigi, anxious to find out what prize they won in a sweepstakes, consult a fortune teller (Kay Ballard) for help.
In a flashback to their days of Basic Draining at the Brooklyn Academy of Plumbing, Mario and Luigi tell of their troubles with Drain Sergeant Kooperman and why the President of the United States called them to the White House.
Mario's group tries to save Aqualand from Koopa's reign. Baseball manager Tummy Lasagna (a parody of Tommy Lasorda, played by Joe Bellan) arrives to sample Mario's meatballs for his restaurant and hires the Marios to sell peanuts at the ballpark.