Stitch's Birthday: Part 1 is the seventh episode of Stitch! Best Friends Forever. It first aired in Japan on August 31, 2010 and in English on April 13, 2013.
Yuna, Stitch, and Pleakley try to use Jumba's new time machine to find out about Jumba and Stitch's past, but the car is quickly confiscated by the Galactic Armada police. They find Jumba who is partners with Hamsterviel and is Delia's boyfriend, but unknown to Jumba, as soon as Experiment 626 is complete, they plan to steal the other experiments without paying Jumba. The gang tries to convince Jumba, but it doesn't work and sees through their phony disguise, but when Nosy (199) reveals the truth on live television, Jumba is devastated. This is followed by and angry phone call to which Jumba tells Hamsterviel that not only will he not be getting the experiments, he will not make 626 (which is bad because Stitch will cease to exist). Hamsterviel himself pays Jumba a visit with his henchmen to steal Jumba's experiments by force. Stitch manages to overpower the guards and sends Hamsterviel back to Planet Turo. Jumba decides to make 626, but since Hamsterviel's funding for the cell is out, they have to find an easier way. Yuna, Pleakley and Stitch return to the car, but it is destroyed by the time they arrive. Stitch soon starts to glitch, meaning something is wrong with him.