Kirby's Dream Collection is a 2012 video game published by Nintendo for the Wii system. It is an anthology disc celebrating the series' 20th anniversary, that took place on April 27, 2012. The game has been released with a booklet that tells about Kirby's history, with a soundtrack as well with music from the series and sound effects. The game was released in Japan on July 19, 2012 and will be released on September 16, 2012 for North America and Europe later in the year.
Source: Wikipedia, "Kirby's Dream Collection", available under the CC-BY-SA License.