Lilo & Stitch: The Series - Season 1 - Eps 30: Angel
Experiment #624 - Angel Experiment #624 has been activated by Gantu, and is used as a secret weapon to try to turn Stitch evil. But because Stitch is more advanced than #624, aka Angel, her evil song doesn't work on either him or 625. Her song does work, however, on the other 623 experiments, so she makes up an army of the experiments on the island. Meanwhile, Stitch tries to get Angel's affections, and Lilo experiences jealousy.
About Lilo & Stitch: The Series

Title: Lilo & Stitch: The Series
First Air Date: 2003-09-20
Last Air Date: 2006-07-29
Status: Ended
Rating: 7.38/10 (from 576 votes)
Language: EN
Seasons: 2
Total Episodes: 67
Network: ABC Disney Channel
Genres: Animation, Family, Comedy, Action & Adventure, Sci-Fi & Fantasy, Kids
Production Companies: Disney Television Animation
Synopsis
This animated series chronicles the further adventures of renegade scientist Dr. Jumba Jookiba's beloved Experiment 626, who is now living happily as Lilo's alien buddy Stitch. Jumba’s remaining experiments have landed all over Hawaii in the form of dehydrated pods. Lilo and Stitch’s mission is to catch Stitch’s "cousins" before they fall into the clutches of the evil Dr. Jacques von Hamsterviel!
Cast

Daveigh Chase
Lilo Pelekai (voice)

Chris Sanders
Stitch (voice)

David Ogden Stiers
Dr. Jumba Jookiba (voice)

Kevin McDonald
Pleakley (voice)

Tia Carrere
Nani Pelekai (voice)

Kevin Michael Richardson
Captain Gantu (voice)