Robbie Rotten pretends to be the Mayor’s favorite rock and roll singer, Johnny B. Badd, so he can demand that Sportacus leave town.

When Robbie realizes that Sportacus started learning all of his hero skills when he was a boy, he turns Sportacus into a 10-year-old.

Stingy is tired of the mess in LazyTown and tries to get them to clean up all the garbage. But the kids aren't interested, and their mess continues to grow. Robbie overhears this and realizes that if he makes a huge mess in LazyTown, the kids won't be able to play any more.

When Mayor Meanswell goes away for the day to catch butterflies, Robbie decides to impersonate him and starts changing LazyTown’s rules – no more sports candy, and Sportacus must leave town forever!

The Mayor warns the kids to stay away from an old, unsafe castle, but Trixie ignores the warning and convinces the kids to join her inside, where Robbie poses as a ghost to scare them into not playing any more.

The Mayor has informed the kids that they can play outside, but they must read and pay attention to the signs – such as the one telling them to be cautious on the frozen lake. Robbie disguises himself as a snow monster in order to frighten the kids and stop them from playing outside in the snow.

The kids decide to create a circus in LazyTown. Robbie quickly formulates a scheme to blast Sportacus out of a cannon and out of LazyTown.

A competition is created in LazyTown where whoever wins gets a ticket to Sportacus' airship, but Robbie steals the ticket and attempts to let the air out of the ship.

Pixel has created LazyTown TV, a new TV station for the inhabitants of LazyTown to show off their talents.

As Stephanie and the others go to school, Robbie comes up with a plan to prevent the kids from learning, disguising himself as a teacher, and not teaching them lessons.

Sportacus gives each of the children an energy book and stickers to help them keep track of their daily habits, including exercising, brushing their teeth. Robbie attempts to distract them from using the stickers by appealing to each of their own character traits.

The town's residents have a disagreement on where Sportacus's birthday celebration should be held, while Robbie uses this to his advantage and builds a giant wall separating the town.

Mayor Meanswell plans to modernize the town, and Robbie uses this perfect opportunity to disguise himself as a technician to keep the kids busy and lazy with the new technology.

The Mayor runs a race called the LazyTown Derby. Stephanie, Stingy and Ziggy build race cars, but Robbie cheats by getting himself a rocket powered car.

Robbie is visited by a magical genie who grants him three wishes, but his wishes go wrong.

Pixel makes a machine where people can be scanned into the storybook, so Pixel scans Stephanie, Ziggy and Stingy into the book, and the story goes well until Robbie scans himself and disguises as a Wolf to change the story.

Robbie invents a machine that pulls toys away from kids. He sends two of the devices to Paris and China, so that Sportacus will have to leave LazyTown to help the kids in those countries, meanwhile, Robbie takes away all the toys in LazyTown.

Stephanie and Ziggy decide to open a dance school in LazyTown. When Robbie learns of this, he disguises himself as the head of a famous dance school and invites Stephanie to join him far, far, away.