It's Mertle's birthday, and she's got a brand new bracelet! But Lilo soon finds out it's got an experiment pod, though she doesn't know the number. So, Stitch goes undercover for her, and discovers it is the pod for Experiment #606. Now Lilo must get the pod back as quickly as possible; as #606 is an experiment that can suck in the entire world!

Lilo finds the pod for Experiment #509, which is a plant experiment. Lilo wants to activate to find it's true place, but Jumba won't let her and locks it up. However, when she makes a bet with Mertle, she breaks the lock and activates #509 and dubs it Sprout. But things get out of control at the Kauai Town Fair, and Stitch has a showdown with a cowboy.

Experiment 020: SLICK

Chaos ensues as Slick, a fast-talking experiment who can sell anything to anyone, teams up with Lilo and Stitch to sell candy bars for the Hale Kaiulu's annual fundraiser. Lilo soon learns the hard way that Slick is not designed to stop, and she and Stitch must reclaim their household items before it gets too late.

Experiment 029: CHECKERS

Lilo is angry and under appreciated about her float not getting chosen for the parade, and being grounded (along with Stitch) by Nani and Pleakley.

Experiment 133: PJ

Lilo's always getting blamed for Mertle's pranks, so she figures it's high-time to pull a few pranks of her own, and what better prank-ee than the mean old substitute hula teacher?

Experiment 267: WISHY-WASHY

Lilo learns a valuable lesson in being careful what you wish for when Experiment 267 is activated.

Experiment 540: PHOON

Lilo quits experiment hunting go to Hula Hip Hop Fusion school. Meanwhile, Experiment 540 is unleashed, causing Gantu to take a bad blow to the head. Jumba new device causes Phoon to mutate into a giant monster. And Gantu thinks thing like 625 and Hamsterveil are just figments of his imagination.