Mashy, A.K.A. Experiment 225, is an illegal genetic experiment created by Jumba Jookiba. He is designed to crush orbs of Uburnium in his massive jaws. He was supposed to do what Clip was designed to do: consume Uburnium to cause an energy crisis. His one true place is with Clip.
Experiment 225 was the 225th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to crush orbs of precious Uburnium in his mouth, which Clip was originally made to do, due to an error on Jumba's part, as Uburnium was close to the word for "hair" on his planet. 225 and the other first 624 experiments were deactivated and smuggled to Earth by Jumba during his mission to capture Experiment 626.
All of the experiment pods were released and scattered across the island of Kauai.
At some point, 225 was presumably activated, captured, and named Mashy.
The first 624 experiments, including Mashy, were rounded up by Leroy and taken to a stadium to be destroyed. However, Lilo, Stitch, Jumba, Pleakley, Reuben and Gantu arrived before the experiments could be destroyed.
Mashy participated in the following battle between the experiments and the Leroy clones.
The Leroys soon gained the upper hand in the battle, but were defeated when Lilo, Stitch, Reuben and several other experiments performed the song "Aloha ʻOe", which caused the Leroy army to shut down due to the original Leroy's fail-safe.
Mashy is a light blue dinosaur-like experiment, with a huge mouth, with tiny horns above each nostril, two large ears and a large body.
Mashy can crush Uburnium by using his enormous mouth. He was reprogrammed to blow air from his mouth.
- Mashy's pod color is green.