Leroy & Stitch (2006 Video)
When Leroy is searching for all the experiments, the theme song to the TV show Hawaii Five-O is playing.
Dr. Hämsterviel says he is sending Jumba, Pleakley, and Stitch to coordinates 12-21-979, which is the release date of The Black Hole (12/21/1979)
Jumba's reaction while looking at the black hole is similar to Doctor Doppler's reaction to the black hole.
DVD release reviewed + footage used
When Hämsterviel is in jail at the end of the movie, the other imprisoned Leroys in cells around him start dancing to the song.
Jumba turns the volume up to "11".