Monster discovers that Robot played a practical joke on him during their childhood and decides to get even.

Monster helps Robot achieve his life-long dream of playing in a Pole-O game.

When Robot's mean-spirited older brother, Gart, becomes the landlord of Robot and Monster's building, the boys must put their heads together to get their apartment back.

After an injury occurs at the Blinking Light Factory, Gart commissions Robot and Monster to make a safety video.

Robot and Monster institute emergency pet training when Marf displays destructive behavior.

Gart goes to accept an award and leaves Robot in charge of the Blinking Light Factory.

Robot and Monster want to buy a blimp, but their obsession with bacon gets in the way.

After discovering a mechanical worker who always smiles, Monster worries that he may no longer be the happiest guy in the world.

When Nessie takes her first vacation, Robot and Monster fill in for her at The Makin' Bacon.

Globitha comes to stay with the boys and wreaks havoc on Robot's preparations for the Big Blimp Race.

After Monster's Uncle Cuffley loses his confidence, Robot and Monster set out to ignite his passion for the law.

Monster's father comes to town to compete with Monster in the Hornica Games.

Hoping to lower their rent, Robot and Monster try to befriend their landlord, Mr. Wheelie, by showing him a good time and ultimately discovering the root of his cantankerousness.

When Ogo befriends Robot's inventor rival, Lucy, Robot is thrilled to be rid of him. But then he realizes Lucy is using Ogo for spare parts.

J.D. comes to stay with Robot and Monster after she has a falling out with Spitfire.

The boys scramble to think of money-making schemes when Monster gives away their rent money.

Robot becomes Monster's guinea pig when Monster starts playing pinball, a game where players throw spiky balls at a target.

Robot invents a device that translates Marf's language into speech.

After Robot and Monster's apartment is burglarized, Robot designs a hazardous security system.

Robot and Monster visit the city's sewage treatment plant in an attempt to avoid Ogo's birthday party.

Despite suffering from worsening symptoms, Robot refuses to go to a doctor after he is bitten by Marf.

When Monster's invention becomes a success, Robot is determined to invent something even more successful.

Monster believes that Robot has been unfairly accused of littering and takes his case to court.

Robot is declared the new standard of beauty by a famous fashionista.

When Grandma 10010 goes missing, Robot must find her before his mother finds out that she is gone.

Robot creates a replica of himself to do tedious tasks, and winds up allowing it to take over most of his daily activities.

Robot worries about Monster's sanity when Monster will not give up believing in his imaginary friend.

Monster loses his license and is forced to attend pedestrian traffic school.

Robot can not bear to tell his friend the truth when he discovers that Monster's childhood idol is a thief.

After studying Letterology, Monster fears that disaster awaits Robot if he falls asleep.