At the start of the movie, Stitch is having a nightmare about turning bad again and causing destruction to Earth, including hurting Lilo. After Stitch is woken up by Lilo, she comforts him by telling him she knows he would never cause harm to her. Lilo also tests his goodness level by having him do a few good deeds. Discovering that they are late for hula class, they use their hovercraft to get there.
While at the hula class, Kumu announces that Lilo and her classmates have to prepare to perform at the local May Day festival. Each student is required to create an original dance. Lilo is inspired when he tells her about her mother being in the festival at her age and winning, giving her a picture of the event. After the hula class ends, Mertle insults Lilo by telling her that she will never be like her mother, causing her to start a fight with her. But after taking pictures of the brawl, Stitch forgets to flush the evidence. Kumu thinks that Lilo is not ready for the competition because of the fight with Mertle, but Lilo says that she is ready and "triple promises" to be good.
While preparing for the competition, Lilo and Stitch have a hard time coming up with ideas and Nani wants them to enjoy their family fun night. While watching Them! on family fun night, Stitch's past comes back to haunt him and he goes berserk in the house. It seems that after Stitch was created, Jumba did not get a chance to fully charge Stitch's molecules as he was arrested by the intergalactic police who disrupted the process. At first, this glitch causes Stitch to revert to his old destructive programming, but it will ultimately destroy him if Jumba cannot create a fusion chamber before Stitch's energy runs out for good.
Meanwhile, Stitch's uncontrollable destructive behavior drives a wedge between him and Lilo and threatens to ruin her chances for success at the hula competition. Lilo and Stitch try to be inspired for their hula, but Stitch keeps malfunctioning because of his molecules. Since Lilo is so concerned about winning the competition, she fails to notice Stitch's glitch, which is not his fault, and she believes his new behavior is deliberate and begins to neglect him.
Eventually, the two devise a hula based on the legend of Hi'iaka. Lilo gets increasingly mad at Stitch as he ruins their practice sessions. To make matters worse, Jumba is having problems creating the fusion chamber because he doesn't have the proper alien technology to build one and must resort to using mere household objects. However, just before the competition, Stitch arrives just before Lilo is to perform, wishing her luck. The two make up as Jumba finally completes the fusion chamber. However, Stitch has another abrupt fit. Lilo, confused, tries to come up to him, causing Stitch to accidentally scratch her face. After this, Stitch becomes greatly upset that he hurt her. Knowing that Stitch would never want to intentionally hurt her, Lilo finally realizes that something is wrong with him. Lilo tries to ask what's wrong, but Stitch runs off to leave Earth, believing himself to be too dangerous. In the middle of her performance, Lilo runs off to help him.
As Stitch attempts to leave Earth, Lilo and the rest of the family desperately try to get him back to re-charge him. While taking off, Stitch has another outburst, which causes him to crash the spaceship in the Hawaiian mountains. Lilo rides over to the crash site in the hovercraft from earlier where she finds Stitch close to death and hurriedly gets him into Jumba's fusion chamber. However, it's too late and Lilo watches in tears as Stitch dies.
Taking him out of the chamber, Lilo clings to him as she tells him that while she kept saying that she needed him, he needed her more. She says that he is her ʻohana and, therefore, will always love him and breaks down in tears. Very much like the Legend of Hi'iaka, Stitch is revived from the sincere love from his family. The family (along with David) then performs Lilo's hula dance together on the empty stage of the competition. Nani tells Lilo that their mother would be proud of her and a star twinkles in the sky to prove it.
- Dakota Fanning as Lilo Pelekai
- Tia Carrere as Nani Pelekai
- Chris Sanders as Stitch
- Kevin McDonald as Wendy Pleakley
- David Ogden Stiers as Dr. Jumba Jookiba
- Jason Scott Lee as David Kawena
- Emily Osment as Additional Voices
- Jennifer Hale as Additional Voices
- Derriqua Dorsey as Additional Voices
- Paul Vogt as Prison Guard and Various Voices
- Stitch (626)
- Gloomy (136)
- Flashbomb (146)
- Hotl (157)
- Sprok (231)
- Futurehole (279)
- Gellasifier (286)
- Stringulator (289)
- Spunky (305)
- Lotuseater (349)
- Punk (407)
- Little Dorrat (472)
- Twitch (481)
- Midasminus (559)
- Lardo (574)
- Gunner (614)
- The film seems to overlook the continuity established in the PlayStation 2 video game, Disney's Stitch: Experiment 626. In this game, set before the events of the first film, Stitch is apparently fully charged and wreaking havoc in outer space. This plot is also evident in the deleted scene entitled "Stitch's Trial" shown on the first Lilo & Stitch DVD.
- It can be noted as an inconsistency that in Lilo & Stitch: The Series, Stitch mostly talks in his native alien language, yet for most of Lilo & Stitch 2 (and the English dub of the Stitch! anime), he can speak in fluent English.
- Despite these differences, it appears that Disney has retconned Disney's Stitch: Experiment 626 and that Lilo & Stitch 2: Stitch Has a Glitch stands in continuity, appearing after the first installment, and prior to Stitch! The Movie.
- The layout of the house has changed, but because Lilo & Stitch 2: Stitch Has a Glitch takes place before Stitch! The Movie, it is possible that the house has been renovated between the two films.
- However, in the Stitch! anime third season two-parter "The Day Stitch Was Born", Stitch, Yuna, and Pleakley go back in time, accidentally delaying Past Jumba's creation of Past Stitch, causing Stitch to glitch as he is slowly being erased from history. At the end of the episode, Past Jumba completes Past Stitch and had him fully charged, thereby restoring present day Stitch. Also, Past Jumba and Past Stitch were not arrested at the end of the episode.
- According to TV.com,"Lilo & Stitch 2: Stitch Has a Glitch - Trivia" TV.com. Retrieved on February 22, 2017. Jess Winfield, executive producer and writer for Lilo & Stitch: The Series, stated that when the series started production, his production team discussed with the Lilo & Stitch 2 producers to avoid any story conflicts for Stitch! The Movie. When Leroy & Stitch was well into production, they were asked to look at an early version of Lilo & Stitch 2 to check for inconsistencies, and they definitely noticed a few. Some of the inconsistencies included completely different names for Mertle's posse (DisneyToon came up with their own names, hence why Teresa was called "Aleka" in the film) and the inconsistency regarding Mertle's unseen father (he apparently still lives with his family in Lilo & Stitch 2, whereas he's absent in Mertle's life as of the series' continuity). Considering that Lilo & Stitch 2 was released without correcting these issues, it was apparent that DisneyToon felt it was not necessary to revise their film to maintain consistency with the series' mythology. Winfield implied that he treats Lilo & Stitch 2 as an alternate universe, even though Disney tends to promote the film as an interquel on some digital storefronts and the original DVD release.
The Origin of StitchEdit
Included on the DVD release of the film is the animated short The Origin of Stitch. The short has a total running time of 4:35 minutes and serves as a bridge between Stitch Has a Glitch and Stitch! The Movie (and Lilo & Stitch: The Series). In the short, Stitch discovers Jumba's secret computer that reveals what creatures Jumba had used to create Stitch, and also hints at his other 625 experiments. Stitch is scared to find out what a monster he is, only for Jumba to come in and explain how he found love when he met Lilo. This short was directed by Mike Disa and co-directed by Tony Bancroft.
- When Pleakley and Jumba join Lilo and the others in the room, Pleakley first has on a black sandal and a white high heel. The sandal then changes into another white high heel when we next see him. Yet nowhere do we see Pleakley remove the sandal, nor is it in the room; it has disappeared entirely.
- The photos in the tree house move around between shots.
- When Pleakley is retrieving items for Jumba's fusion chamber, he retrieves a toaster from the kitchen. The toaster has no electrical plug, yet when it is placed back on the kitchen counter and shown, the toaster has a plug.
- When Jumba first creates the fusion chamber machine (to recharge Stitch's molecules) the handle to turn it on was on the right-hand side of it. When he created the machine again, the handle was on the left, but when Lilo was putting Stitch in the machine, the handle was back on the right again.
- At the climax of the movie, when Stitch gets evil a final time, he hurts Lilo and gives her a scar, but in the next few shots, her scar disappears.
- When Nani slams on the car brakes to prevent it from falling over the cliff, viewers can clearly see that the gas pedal and the clutch pedal are on the wrong sides. The gas pedal is to the left of the brake pedal, and the clutch pedal is to the right of it. They should be on the opposite sides, even though the driver's seat is on the left-hand side of the car.