Boomer (Lilo & Stitch)

Boomer, A.K.A. Experiment 288, is an illegal genetic experiment created by Jumba Jookiba. He is designed to be a living boomerang. His one true place is with Mrs. Hasagawa as one of her "cats".

History
Experiment 288 was the 288th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to be a living boomerang.

288 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. 288's pod was one of the many experiment pods that landed in Mrs. Hasagawa's yard.

Lilo & Stitch: The Series
288's pod was found by Mrs. Hasagawa along with numerous other pods and activated.

Lilo, Stitch, Jumba and Pleakley captured 288 and the other experiments, but returned them to Mrs. Hasagawa when they saw how much she cared for them.

Leroy & Stitch
The first 624 experiments, including Boomer, were round 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.

Boomer participated in the following battle between the experiments and the Leroy clones by being thrown at Leroys' heads.

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 Oe, which caused the Leroy army to shut down due to the original Leroy's failsafe.