See also the YMMV page for the TV series that precedes this.
- Awesome Music: Elvis Presley's music returns to the Lilo & Stitch franchise for the final time in this film. The ending even uses one of his most iconic songs, "Jailhouse Rock".
- Ensemble Dark Horse: Leroy. Granted, he's only a red, evil, more aggressive Stitch who gets cloned shortly after his creation, really only plays second fiddle to Hämsterviel, and receives no other (in-universe) appearances after this movie, but fans enjoy watching him nonetheless. Plus, he's the closest thing to what Stitch could have been like if he never reformed, making him more interesting in that regard.
- Harsher in Hindsight:
- If you've seen the anime that follows this film, then you know that Lilo and Stitch would eventually go their separate ways for good. (This heavily depends on its canonicity, however.)
- Hell, the fact that this is the last time we see Lilo and Stitch living together in the franchise since every Lilo & Stitch work made after this film (the aforementioned anime and Stitch & Ai) takes him away from her, with The Series's own producers expressing a disinterest in returning to Hawaii in favor of separating the duo and giving Stitch new families elsewhere on Earth. Aloha ʻoe, indeed...
- Ho Yay:
- The bromance between Jumba and Pleakley continues in this film. They both move out of Nani's house to pursue their goals and dreams in space, but it becomes obvious that they miss each other. Pleakley even has a picture of Jumba in his office. They both continue to be 'ohana with Lilo, Nani, and Stitch after Hämsterviel's final defeat. This means that Jumba and Pleakley move back into Nani's house and continue to live together, even though they have no other important reason to do so anymore.
- Gantu and Reuben's relationship improves vastly in the end of the film. Initially, Gantu leaves Reuben to help out Hämsterviel, which upsets Reuben a bit but they get back together. Gantu was revealed to have a tattoo of Reuben's name on his bottom and Gantu even makes the condition that he would accept his old job back if Reuben would accompany him as a companion and assistant.
- Moral Event Horizon: Hämsterviel crosses it when he tries to wipe out all the experimentsnote at once.
- Sequelitis: Like with Stitch! The Movie, this is downplayed. Leroy & Stitch does a decent job of giving The Series a proper ending and watching the experiments use their powers and abilities to fight back against the Leroy clones is great, but the ending is very predictable,note Leroy is nothing more than a flat Evil Doppelgänger of Stitch, his song-based fail-safe is a rather lame Deus ex Machina, and we still don't get to see what most of the other unseen experiments look like. (Some never-before-seen experiments do show up, and we see a list of experiment names in the credits, but that's really it.) This all makes it seem like Disney made this movie just to give the Lilo & Stitch franchise some sort of conclusion regardless of how well it would turn out. This is best summed up with what WatchMojo said of the film; although they ranked it at number 10 in their "Top 10 Worst Straight to DVD Disney Sequels", they said, "The movie itself isn't unwatchable, just more of the same and entirely unnecessary."
- So Okay, It's Average: You did just read Sequelitis, right?
- Tear Jerker:
Lilo: Nani says Aloha means "hello" and "goodbye"... But for us, it mostly just seems to mean "goodbye".
- The montage set to Elvis Presley singing "I'm So Lonesome I Could Cry", when Stitch, Pleakley, Jumba, and Lilo realize that their happy ending isn't as happy as they thought.
- Then there's the heartbreaking line that Lilo says after she and Reuben are captured by Hämsterviel.
- Unnecessary Makeover: Victoria gets her hair cut by Clip in a brief scene in this movie, but fans still prefer her old ponytail. Downplayed, however, since she's only a minor character and only gets a couple brief appearances in this film.