The Cadets are working hard to prepare a special surprise party for Professor Pip. Esme finds out about the party and tires to put a stop to it. She sends a special cake to the Ecco Lab as part of her plan. While preparing the food for the party, the Cadets unknowingly let in their uninvited guests.

The Cadets are working hard to prepare a special surprise party for Professor Pip. Esme finds out about the party and tires to put a stop to it. She sends a special cake to the Ecco Lab as part of her plan. While preparing the food for the party, the Cadets unknowingly let in their uninvited guests.

A sudden volcano eruption causes the need for an evacuation in the peaceful district of Glacier Hills. Snowy finds out and secretly joins the Cadet to help protect his hometown. Meanwhile, under Esme’s command, a lava monster, begins to cause trouble in Glacier Hills.

The Cadets are enjoying playing frisbee outdoors. Suddenly, an alert comes from the Ecco Lab indicating that there is trouble. Poppy is trapped in a cave and is in need of their help. As the Cadets set out to rescue Poppy, they find a small creature with a tremendous roar.

It’s Cinco De Mumu in Mumu Kingdom. As a representative of Mumu Kingdom, Princess Mimi is supposed to make a speech at the Color Festival. The Cadets help her practice, but it doesn’t seem to calm Mimi’s nerves. Meanwhile, the rainbow dust prepared for the festival loses all its color when the Grumbles appear with their Grumble Color Catcher. The Mumus begin to lose all their strength as their colors begin to disappear.

Curly is in full detective mode and tries to analyze and solve every problem. Mysteriously, the best sculptor of Mumu Kingdom, Mutisse, and a baby Mumu, Max, go missing. Curlock Holmes, with his versatile detective briefcase, and the Cadets run to Mumu Kingdom to solve the case.

Professor Pip and the Cadets wait until dawn to see the shooting stars. They admire the shooting stars until they see violet and orange lights falling to the ground. They find a purple Gurgly-Boop with amazing transformation abilities. The Gurgly-Boop fell to Badanamu because of a ray shot by Esme.

It's time to go camping in Badanamu. The rules of the camping trip are simple, absolutely no Cadet Technology! However, it seems to be difficult for Abby. Even at the campsite, Abby misses using technology. Out of nowhere, a video game machine appears.

The Badanamu Train passing over an iron bridge is obstructed by a landslide. The Cadets brought the size-revizor to shrink the rocks, thinking it was a minor casualty. However, the Grumble's real plan is to steal the size-revizor. Meanwhile, Tammy, a small kitten, is hit with the size-revisor and increases in size.

Mipi must earn a bravery badge to become a Forest Friend Leader, but it is not an easy task for timid Mipi. During the Forest Friend training in the woods, a huge monster with a creepy sound appears. Mipi volunteer to investigate.

As the princess, Mimi is given the responsibility to take care of Mumu Kingdom while King Mumu is away. Mimi is bored spending time in the kingdom and going through documents all day. Suddenly, the Grumbles storm outside with an evil plan. Goob grabs Mimi's crown and uses it to lock down Mumu Palace.