In one shot of the experiments in the stadium Timon and Pumbaa from The Lion King (1994) can be briefly seen standing in the crowd.
The fourth and final film installment of the Lilo & Stitch franchise, this film also served as the conclusion of the franchise itself until the Stitch! (2008) anime, which later confirmed its sequel status in its third season.
Experiment 625, introduced in Stitch! The Movie (2003), finally gets his name - Reuben, named after the sandwich since 625 loves sandwiches.
This film was released on television first, but is often considered a direct-to-video film because is was released on DVD just four days later.
The DVD contains the Lilo & Stitch: The Series (2003) episode Link: Experiment 251 (2006) as a bonus feature. At the time of Leroy & Stitch's premiere, it was the only episode that hadn't aired on television yet. It would air as the final episode of the show the following month.