Stitch! - Season 3

Stitch and Yuna move to Newtown with Tigerlily as the behest of Gramma due to (in the Japanese original only) Izayoi Elementary School closing soon. While there, they meet Dolores, Jessica, her friends Toriko and Makiko, and Hiroman. Later, Stitch wants to return Yuna's handkerchief, but ends up almost destroying the school, which upsets Yuna. Meanwhile Hämsterviel, on orders from his new partner, Lady Delia, has recaptured the other experiments and begun mutating them with additional abilities. His intent is to capture Stitch so Delia can extract the Neo-Power Chip from within him. Stitch later begins to leave and gets attacked by Plasmoid and Splodyhead, and again destroys the school, which then makes Yuna think Stitch has broken his promise and lied to her. Stitch stays away from Yuna to try to catch the two altered experiments, but gets captured by Gantu. Yuna feels guilty for not believing Stitch and goes to find him at school, but then gets attacked by Plasmoid and Splodyhead. Stitch then saves Yuna and she apologizes to him for not believing him. After hearing about Hamsterviel's failure, Delia tortures him with a bomb.

Yuna continues to try to be Jessica's friend with little progress. However, Yuna has to come to the rescue when Hämsterviel modifies Sample with the ability to control his victims with a powerful melody.

Yuna is trying to attend Jessica's birthday party in another attempt at befriending her, but Jessica invites Yuna only to humiliate her and have her clean up before and after the party. Hämsterviel is inspired by this and outfits Wrapper with the ability to trap his enemies in indestructible gift boxes.

Hiroman's team is going to be on TV, and everyone's getting excited about the event. While trying to return some things, Yuna learns the soccer captain is blackmailed by his sisters, who are Tigerlily's old friends. Meanwhile, Gantu gets the wrong experiment and Dorkifier is released on the town, sticking people including Stitch, Yuna, Hiroman, and Pleakley in ridiculous outfits. Hiroman's so upset with his new look he doesn't want to come out.

Yuna's class heads off to camp where she volunteers to help out with the haunted trail in order to spook Jessica. She gets some extra help from Delores, Stitch, Jumba, and Pleakley in doing so. However, Gantu's not too far behind with both Toons and Spooky in hopes of catching Stitch.

The whole town's excited over a local limited-time-only dessert called fluffy rolls. However, Stitch's cousin PJ is given a Stitch costume and starts framing Stitch for a variety of pranks.

While Delia is away, Hämsterviel decides to compete in a child prodigy show on Earth for the big cash prize alongside Reuben and Gantu. Also competing for their school are Jessica, Yuna, and Delores. Realizing the competition is fierce, Hämsterviel decides to cheat with Spike's help.

Gantu and Reuben trick the kids into going to a deserted island to find a flower said to grant wishes. Only they find Sprout, now upgraded with 627's DNA.

Stitch and Yuna go back in time to the day Jumba built Stitch.

Yuna, Stitch, and Pleakley have messed up the timeline by traveling to the past and Jumba must finish building Stitch before it is too late.

Stitch, Yuna, and a mass number of other students go to an amusement park created by Hämsterviel called Wishlanda, where they have nothing but fun and their every wish gets granted by a disguised Wishy-Washy. However, those who visit become too exhausted to do anything, allowing Hämsterviel to possess them using their "point badges".

Stitch and Yuna find a mysterious yellow alien flutist, who quickly gets everybody's collective attention. What nobody realizes is Flute (named Bragg in the Japanese original) is actually Experiment 145 (misnumbered 021, the number of "Twang", in the Japanese original), who not only frames Stitch for mass destruction but the more attention he gets, the stronger Flute becomes, even to the point where he can outdo Stitch.

While setting up a Halloween party for the school, Jessica becomes possessed by the experiment Witch, turning her into a literal witch.

Hämsterviel disguises himself as a substitute teacher to get close to Stitch, also becoming the coach of the school's 5th grade girls' volleyball team. The only problem is that he's starting to like the job and becomes invested in the team's upcoming game against the 6th grade team.

Yuna has to do a report on shoguns and what they eat, so she borrows Toons to bring a picture of a shogun's dinner to life, only to bring an actual shogun to life. Not only does she have to hide him, Tigerlily falls for the shogun and Hämsterviel decides to upgrade Kixx with a katana.

Yuna gets turned into a dog by a transmutated Elastico. Mistaking Yuna's dog form as a stray, Jessica takes her home in the latest attempt to date Hiroman, prompting a rescue from Stitch.

Toriko, the tall girl of Jessica's group, signs up for a teenage beauty contest alongside Jessica. Feeling crushed, she accepts Yuna's help in the event. However, Hämsterviel, having bad memories about Homecoming, sends down a stronger Thresher to wreck the show.

Hämsterviel gives Reuben an upgrade, in hopes he'll capture Stitch. But problems arise when Reuben's more interested in Angel.

Stitch plans a Christmas party and invites Yuna's father and grandmother to New Town to surprise Yuna. Meanwhile, Hämsterviel gives out clones of Mr. Stenchy and Mrs. Sickly out as presents as part of a nefarious plot. However, the clones are spread all across Earth, and Hämsterviel , Gantu and Reuben must temporally join forces with Stitch and the others to replace them with harmless robotic replicas because their combined smells will destroy Earth

Stitch and Hiroman swap bodies. While the two enjoy being each other, Hämsterviel sends down Heat to capture Stitch in Hiroman's body.

Tired of being Hämsterviel's errand boy, Gantu tries to strike out on his own, losing five experiments in the school. However, Stitch is hit by both Retro and Shrink, turning him into a giant version of his old self.

Reuben pretends to be Angel and invites Stitch and friends onto a cruise ship where Hämsterviel plans to throw Stitch overboard so he can catch him without resistance. When Reuben fails, Hämsterviel sends out Sinker and Slushy to capture Stitch.

While taking Yuna to school, Stitch spies someone who appears to be Lilo. Both Pleakley and Jumba are unconvinced as Lilo was starting college when they last spoke. While seeing Stitch happy with this girl, Yuna learns of how Lilo and Stitch broke up. Pleakley explains that Stitch went on a four-year mission and Lilo went to college with the promise that they would meet when they returned, but Lilo didn't. Seeing the confusion, Hämsterviel uses Morpholomew, now with the ability to transform himself into any picture the experiment sees to capture Stitch. While trying to rescue Stitch, Yuna discovers the girl Stitch has been following is actually Ani, Lilo's near-identical daughter. After stopping Gantu and capturing Morpholomew, Stitch learns that the reason Lilo didn't show up was that Lilo's sister Nani had given birth at the same time as their meeting, and the two make up after years apart.

Hämsterviel sends an upgraded Babyfier to turn Stitch into a child so Stitch would be easier to catch. Instead, Babyfier turns Yuna and her classmates into kids. With Tigerlily more preoccupied for an upcoming date, Stitch is running himself ragged keeping the kids in check.

It's Valentine's Day and everyone goes to a chocolate factory where Angel is performing. After the concert, they all go and make personalized chocolate valentines, but Hämsterviel is scheming to use Fudgy, now outfitted with the ability to grow after eating chocolate.

It's Yuna's birthday, but she thinks everyone has forgotten...even Stitch! While preparing Yuna's surprise party, Stitch falls asleep and Hämsterviel sends Remmy to trap him in his own dreams, causing Stitch to get sick. Yuna and Jumba most go inside Stitch's head to catch Remmy before Gantu and Reuben capture him.

Checkers escapes Hämsterviel and runs amok at Yuna's school, causing the students to fight for the power to control everyone.

Jumba has developed a second and stronger Power Chip, one stolen by Delia. To test it, Hämsterviel uses it on Dupe so each duplicate made is stronger than the last. Stitch decides to use Dupe so that he can get out of his chores and trouble ensues.

Delia finishes making a new experiment who is stronger than Stitch named "Dark End". Dark End and Stitch battle, leaving Stitch unconscious.