Rhythm Heaven Megamix/Unused

Development History
Development of this title was much like the previous games, with series producer Tsunku♂ working together with the staff at Nintendo to form the game around the songs, or vice versa. During the latter half of development in October 2014, Tsunku♂ was reportedly hospitalized for larynx cancer, and had his vocal chords removed. This necessitated having his communication with the staff at Nintendo become more of a back and forth than before. The game was first revealed during the Nintendo Direct on January 14, 2015 in Japan, with the Nintendo Direct on April 2 showing more gameplay footage. On June 6, 2015, Tsunku♂ posted on his blog announcing the game, which would release 5 days later in Japan, titled Rhythm Tengoku: The Best+.

During the Nintendo Direct on March 3, 2016, the game was revealed in North America for the first time. On June 16, 2016, the game was shown off at E3 2016 in North America, and released only on Nintendo eShop on the same day, titled Rhythm Heaven Megamix. On October 21, 2016, it released in Europe as Rhythm Paradise Megamix, and December 1, 2016 saw it released in South Korea as Rhythm Sesang: The Best+. Notably, the localized versions of the game all feature the option to play with the Japanese voices, which was previously exclusive to the European version of Beat the Beat: Rhythm Paradise, and cut from Rhythm Heaven due to memory constraints.