How The Hampsters Saved Winter (lost direct-to-video Hampster Dance film; 2009)
The DVD cover of the movie, designed by Asbury Arts. Coincidentally, the same people who designed the current website.
How The Hampsters Saved Winter was a straight-to-DVD lost animated movie about Hampton and the Hampsters going on a "snowy adventure where they help make a family's dream come true." It is unknown who directed or starred in the movie, but it was produced by Abatis International LLC and animated by a company in New Jersey.
The movie was listed for sale sometime in 2009 on the Hampster Dance website, with a link to order it through the site Kunaki. The DVD was available to purchase as late as 2012.  However, now when someone clicks on the link, they would be directed to a page that says "product not available."
The movie's existence was confirmed in an article from 2018 where Bill Porfido, owner of the Hampster Dance property, confirmed "roughly 2,000 copies" of the movie were sold. No clips, trailers, or audio exists of the movie. Only the DVD cover and the original price of $7.99 is all that exists online.