* Mystery Machine (band): This was a punk rock band from California that was active in the late 1970s and early 1980s. They didn't have a specific "end date" but more faded out of the scene.
* The Mystery Machine (Scooby-Doo vehicle): This is the iconic van from the Scooby-Doo cartoon series. It's never "ended" and continues to appear in various Scooby-Doo shows and media.
If you're interested in the punk band Mystery Machine, there's less information available than you might find for a more well-known band. However, you can find some information about them online, like on the Punk Rock & Heavy Metal Database (RHMDB) or by searching for them on specific forums or fan pages.