Prison Asteriod K-37 is Dr. Hämsterviel's "prison cell" seen in the Lilo & Stitch franchise. He has set it up to be a laboratory, complete with teleportation systems, and the lab itself can be revealed or hidden using an encrypted voice code. It is also where Hämsterviel keeps a number of captive experiments, which Gantu had managed to capture and teleport to him, hidden away in a secret cache.


This prison asteroid appears multiple times in certain episodes of Lilo & Stitch: The Series. In "Woops", Hämsterviel activates Experiment 600 (Woops) who was transported to him by Gantu and believed to be a destructive experiment. However, Woops turned out to be a real klutz, and after causing mayhem around the prison and eventually alerting the prison guards, Hämsterviel was forced to teleport Woops and the other captive experiments back to Earth on Gantu's ship, with orders to get rid of Woops, especially after he unintentionally freed Experiment 199 (Nosy).

In Leroy & Stitch, Gantu breaks Hämsterviel out of prison. Hämsterviel then pays Jumba a visit at his laboratory and forces him to create a new version of Experiment 626 (Stitch). When Jumba finishes doing so, Hämsterviel christens the newly-created experiment Leroy. After Leroy defeats Stitch, Hämsterviel clones Leroy into an army to overthrow the Galactic Alliance. However, in the end, Leroy and his clone army are defeated and taken back to Prison Asteroid K-37 alongside Hämsterviel, where they are all put in individual prison cells and seen happily dancing to the song "Jailhouse Rock" with an angry Dr. Hämsterviel tapping his foot.


On Earth: Hawaii | Kauai | Kokaua Town | Lahui Beach | Lilo's House | Aloha Animal Rescue | Mrs. Hasagawa's Fruit Stand | Hula School | Mertle's House | Mrs. Hasagawa's House | Birds of Paradise Hotel | Kilauea Lighthouse | Kauai Airport | Rental Hut | Muscle Bay | Pineapple Water Tower | Farm | Bugopolis | Haunted House | Kiki's Coffee Hut | Japanese Restaurant | Beauty Parlor | Junior Dog Show | Pet Shop | Costumes | Hip Hop Fusion Studio | Orchard Falls Mall | Mart | Macki Macaw's | French Fry's | Shave Ice | Jumba & Pleakley's Bed & Not Breakfast | Baseball Field | Golf Course | Observatory | Underwater Base | Waialeale Peak | Ali'i Trail | Kimo's Arcade | Onaona Skunk Farm | Kokaua Wildlife Preserve | Museum of Natural History Kauai | Kokaua Town Prison | Kokaua Town Lanes | Laundry Store | Bakery | Gas Station | Cinema | Aloha Stadium | Lihue Airport

In Space: Planet Turo | Plorgonar | Prison Asteroid K-37 | Jumba's Lab | G.A.C.C.
Stitch! Locations: Izayoi Island | Okinawa New Town

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