Stitch doesn't know how to take care of anything, or things that don't belong to him. He's already got Nani in trouble at the Rental Shack, by breaking the Shake Machine. However, when Richter turns up and is causing earthquakes, will Stitch be able to stop him breaking everything... Even his favourite ball?

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?

A bird has discovered a strange blue ball in her nest. After deciding she doesn't need it, she discards it into the river running below her tree. It turns out it's #520's pod, and it activates. Now the experiment is wreaking havoc over the island with it's huge behind by bouncing and shaking the ground. So, Lilo and Stitch must capture it, but Gantu is on it's trail too.

Experiment 248: BELLE While out trying to prove the existence of the Night Marchers (an ancient Hawaiian legend), Lilo, Mertle, Stitch, Jumba, and Pleakley tell each other scary stories. Meanwhile an experiment 248, later known as Belle, is being chased by Gantu.

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.

Mertle has got a new dog; Gigi. Little does she know, it's really Experiment #007, a dog that can keep everyone in the neighbourhood awake with it's loud yapping. So, Lilo and Stitch must protect it from Gantu, but have to go to a dog show to do it.

Experiment 210: RETRO Nani meets some of her friends from high school and tries to impress them by saying she is vice president and they convince her to introduce them to her family. The day only gets worse when experiment 210, tries to revert everyone back to a prehistoric state...

Experiment 285: LAX (Crossover with RECESS) The gang from Recess are on 'holiday' in Hawaii! But experiment 285 is on the loose, causing Vince, Mikey and Stitch to abandon any and all forms of work. Can Lilo stop 285 and Hamsterviel's new experiment locator satellite without Stitch, or will Gantu finally succeed in catching an experiment? Note: This episode first aired on Disney Channel on September 5, 2006 at 5 a.m.

Experiment #375 has been activated; a phantom-like experiment that can inhabit and animate inanimate objects. So when it gets loose in the family's house, it inhabits Lilo's toys and creates all sorts of mess, for which Stitch gets the blame. Can they catch the real culprit, or will Stitch be blamed for everything?

Lilo is upset when Mertle gets a nice-looking fancy hairdo. But when she encounters a hair-eating experiment, Clip, she decides to get her revenge on Mertle by placing it in her bedroom with the plan of ruining Mertle's hair. But the plan runs amock and the experiment eats Mertle's mom's hair instead, and now the experiment is loose on the island. Now Lilo and Stitch must track down the experiment before everyone goes bald!

Experiment #300 - Spooky It's Hallowe'en! Lilo has dressed up asa gory character, while Nani is trying to get everything ready for the trick-or-treaters. Sadly, the house never gets any trick-or-treaters, but Nani wants to fix this. However, Experiment #300, Spooky, is activated, and it can turn into anyone's greatest fear. So, it makes its way to Kaiaulu Hale's Hallowe'en party, and is terrifying everyone. Can Lilo and Stitch stop it?

When Experiment #601 is activated, things are looking bad, as he is beating up the islanders. Stitch is ready for it, but when he eats the combination of a left tennis shoe and macadamia nuts, it creates a toxic poision, which erases all of his super abilities. Now Lilo has to retrain him from scratch, but Stitch doesn't like the idea.

Experiment #222 - Poxy Poxy is activated one day when Pleakley eats it in his cereal! So, Lilo and Stitch must get shrunk with one of Jumba's machine, along with a buggy, and travel through Pleakley to find the experiment. However, Pleakley is captured by Gantu and is going to be sent to Hamsterviel for Poxy. Can Lilo and Stitch get Poxy and save Pleakley in time? And will they do it before they start to turn back to normal size?

Experiment 223: Glitch | Jumba automates the house, but an experiment gets into the computer and the house goes crazy! Can Lilo and Stitch save the day?

Experiment #606 - Holio 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!

Experiment #025 - Topper Stitch is having his first Christmas on Earth, and Lilo is trying to teach him about the holiday. But when Stitch sees an unactivated pod fall into a gift in the mall, he goes crazy trying to track it down. Soon he ends up stealing every gift on the island, and Lilo thinks he has become greedy. However, the truth comes out... But can they find the Experiment pod?

Experiment #199 - Nosy Nani wants a job at Mr. Jameson's hotel, so she invites him and his son Keoni over for brunch to prove how much 'Aloha Hospitality' she has. Unforunately, Experiment #199 has been activated, and he seeks out enemy's secrets. However, a glitch in his programming has made him into nothing more than a gossip. So now Lilo and Stitch must stop him blurting out the family's secrets to Mr. Jameson and Keoni.

Experiment #258 - Sample #258 is activated. #258 is a sound experiment, that records sounds and plays them back to people, like a sample. Meanwhile, Stitch is worried about getting his shots.

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 505: PLOOT When Lilo sets out to clean the pollutants from the Grotto where Pudge the fish lives, she comes across Ploot, a.k.a Experiment 505, eating all the litter around him.

Exxperiment 316: MORPHOLOMEW (Crossover with American Dragon: Jake Long) Lilo enters the island's skateboarding competition in an attempt to win the heart of her one and only crush, Keoni. At the same time, Jake, Gramps and Fu Dog visit the island to check out reports that magical creatures - actually Jumba's experiments -- are running rampant.

Experiment 322: HECKLER Experiment 322 is activated just in time to taunt Pleakley as he makes his stand-up comedy debut at Nani's charity event. While Lilo is first amused by his off-the-cuff jabs, especially towards Mertle, she soon learns that mean words only hurt if you let them.

Experiment #262: Ace | When Jumba is in danger of losing his membership to E.G.O. (Evil Genius Organization) he has to show the leader that his experiments are still evil. But when Experiment 262 is activated and according to the experiment computer it has no evil function, things get worse.

Experiment #600: Woops | Gantu sends Hamsterveil an unactivated pod whilst Pleakley enters a domino competition. Will Woops get in the way?

Experiments #010 - Felix and #010.2 - Oscar Experiment #010 is a neat-freak, named Felix. So when it won't stop cleaning things, Jumba reprograms it to Experiment #10.2, Oscar. However, the newly programmed Oscar doesn't work quite as it should.