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?

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 #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?

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.

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.

Experiments #501 and #502 are both activated at the same time, a water sprayer and a lava sprayer. Unfortunately, Lilo and Stitch are having some problems with each other, and soon decide to split apart, with Lilo teaming up with Pleakley, and Stitch teaming up with Jumba. Can the 2 capture the experiments without their partner?

It's Lilo's birthday, but no one has remembered. So, she decides to give herself her own party. However, during the day, Experiment #303 is activated and wipes Lilo's, Stitch's and Gantu's memory. Lilo and Gantu, who think they are Martha and Lenny go after Stitch, who has returned to his natural destructive programming, and so they think is a criminal.

Pleakley's mother is badgering him about finding a wife, and has even found a perfect candidate on his home planet, so Lilo comes up with an idea: To tell his mom he is already engaged to a human. But Pleakley's family turn up on Earth, so Pleakley must put on a fake wedding, passing Nani as his bride-to-be. But Experiment #032 has turned up, Fibber, and will beep whenever someone is lying. So, as Pleakley tries to plan his fake wedding, Lilo and Stitch have to prevent Fibber from giving away the game.

Stitch has been recently very successful at capturing and repurposing the Experiments, but it's gone to his head. He thinks he's too good for everything and is being a royal pain.

But things are set to change when Pleakley goes into Jumba's ship and sees an experiment pod with the number '627' on it. Jumba has been making a new experiment. Luckily, it's in containment. That is, until they leave the ship and it escapes! Now it's employed by Gantu and Stitch wants to prove he's better than it. But he just gets beaten, and as 627 can't be turned good, Lilo and Stitch are in trouble...

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 #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 #604 - Houdini

Stitch and Pleakley are working up a terrible magic act to perform at one of Mertle's parties, so Lilo secretly helps them out by activating Experiment #303, Houdini, which can make things disappear and reappear with a blink of it's eyes. But when Gantu crashes the party, things go wrong, and Stitch is made invisible and Houdini gets away. And just to make things worse, Mertle's aunt, who is a big LA producer, wants to make Stitch a star because of his magic act, but only Lilo, Jumba, Pleakley and Houdini know it is phony.

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 #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 #297 - ShortStuff

Stitch is getting really upset about people thinking he's too short, so Pleakley uses Jumba's growing ray to make Stitch bigger. Meanwhile, an experiment is activated and it is soon short circuiting mechanical devices all over the island.

Experiment #624 - Angel

Experiment #624 has been activated by Gantu, and is used as a secret weapon to try to turn Stitch evil. But because Stitch is more advanced than #624, aka Angel, her evil song doesn't work on either him or 625. Her song does work, however, on the other 623 experiments, so she makes up an army of the experiments on the island. Meanwhile, Stitch tries to get Angel's affections, and Lilo experiences jealousy.

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.

Experiment #323 - HunkaHunka

Keoni is in love with Pleakley, and Lilo thinks Experiment #323 has been activated and is loose. So, they go after it, while it causes chaos and makes people all over the island fall in love with the first people they see.

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.

Experiments #149 - Bonnie and #150 Clyde

Bonnie and Clyde, two stealing experiments, are activated at the same time and are stealing stuff all over the island. Lilo and Stitch decide to leave their room secretly after they are sent there after getting in trouble. They run into Bonnie and Clyde and the two experiments soon convince the two to do some not-so-nice things while the steal stuff. Will Lilo and Stitch get caught, or will Bonnie and Clyde?