Lilo and Stitch have captured a new experiment, #254. He is insanely cute too, and charms all of Lilo's friends. Stitch is jealous though, so at the first chance he gets, he lets Gantu capture him.

As luck would have it, 42 hours after the experiment's activation, Mr. Stenchy releases such a foul stench, the area he releases it in is uninhabitable for decades. But without knowing of when Mr. Stenchy was activated, how will Lilo and Stitch save him before he releases the smell?

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!

The Hula Girls have ditched Mertle for Lilo, and consequently, Lilo neglects Stitch to hang with them at the Kauai Medieval Festival. So, when Experiment #586 is activated, Stitch needs someone to capture it with. And who does he team up with? Mertle. Strangely, Stitch and Mertle are having fun trying to capture the metal eater, but this ends when it storms the Medieval Festival.

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 #228 - Melty

Lilo makes an idiot of herself in front of Keoni, so she and Stitch decide to use Jumba's Time Machine to go back and change the past. However, she may have fixed her problem, but she creates a bigger problem when Stitch destroys the Birds of Paradise hotel chasing Experiment #228 and Nani is fired from her new job. Will things work out?

Experiment #458 - Finder

Experiment #458 can find absolutely anything, so Lilo names him Finder. And when she takes him to show-and-tell, he's a huge hit, upstaging Mertle. Mertle is bitter, so she searches for something to compete with Lilo's show-and-tell. Unfortunately, she is unsuccessful. That is, until she sees Hamsterviel on planet Earth!

Experiment #344 - Dupe

Lilo and Stitch have managed to capture Experiment #344, who can duplicate anything. This leaves Gantu feeling down, so he goes home to talk to 625 about it. However, 625 gets bored and tells him he doesn't care, causing Gantu to go off in a rage.

Meanwhile, Lilo, who has hosted a slumber party but no one turned up, decides to clone herself using #344, but Stitch jumps in the way, creating an extra 3 copies of himself, who all need training.

Gantu, in his rage, discovers 4 experiment pods: Heat, Plasmoid, Thrasher and HammerFace. He activates them and plans an attack on Lilo and Stitch. But surely 4 Stitches can beat Gantu.. Right?

Experiment #608 - Slugger

After Pleakley's incompetence in baseball causes Lilo, Stitch, and Stitch's cousins to lose to Mertle's team, Lilo and Mertle arrange a rematch, with Lilo's collection of Elvis records and Mertle's collection of dolls on the line. Lilo finds Experiment #608, aka 'Slugger', and decides his projectile-deflection skills would make him an excellent pinch-hitter for her team. Unfortunately, Mertle gets her own ringer in Gantu, and makes the rematch a game of basketball instead of baseball, with Slugger on the line as well! Can Lilo and the experiments win under these circumstances, or will they need help from an unlikely source?

Experiment 062: FRENCHFRY

When Nani restricts Lilo's food to healthy food, Lilo finds an experiment pod that is designed to make tasty, irresistible food, but he is secretly fattening them up to eat them. Will they be saved in time?

Experiment 355: SWAPPER

When Swapper swaps Lilo and Stitch's brains, Lilo thinks it will be impossible to get Victoria, a new girl, to think that she's not weird.

Experiment 277: SNOOTY

After making zombie calenders, Lilo, Stitch, and Victoria encounter experiment 277, a vampire bat like experiment who was made to find and enrich Snootonium, a dangerous chemical that is similar to mucus. Can Lilo and Stitch safely catch Snooty bafore Victoria, who is distrustful and teams up with Gantu to slay him?

Experiment 267: WISHY-WASHY

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