Jumba, Stitch, and Tigerlily are shrunk by Jumba's first experiment, Shrink. The latter two decide to play some pranks around the island, while Hämsterviel and Gantu go after the shrunken Stitch to crush him.

Stitch and Yuna are sucked into an alternate universe by Experiment 272/Wormhole and meet a bad Stitch with a jetpack who enjoys destroying an abandoned city, along with alternate versions of Jumba, Pleakley, and Gantu. As Yuna tries to convince the alternate universe's 626 that ʻohana is better than destroying things, the Jumba of Yuna and Stitch's universe tells them via her good deed tracker communicator that they only have a limited time to find the interdimensional portal back home or they'll be stuck in the alternate universe. However, only Wormhole knows where the portal is and he refuses to leave until he finds a slipper belonging to Jumba that he lost to a previous portal before, which he believes to be in this alternate universe.