Which 2015 Nintendo 3DS game is described as a compilation of minigames from past Rhythm Heaven entries?

The 2015 Nintendo 3DS game described as a compilation of minigames from earlier Rhythm Heaven entries is Rhythm Heaven Megamix. Released in Japan in 2015, it gathered rhythm games from the series’ previous installments and added new material.

Megamix draws from Rhythm Tengoku, Rhythm Heaven, and Rhythm Heaven Fever, making it both a retrospective and a substantial new entry. Its appeal comes from placing older challenges in a new progression while introducing original games, remixes, and a story structure designed around moving through different areas.

The wording can cause confusion because Rhythm Heaven titles are themselves collections of minigames. Rhythm Heaven Groove is a later Nintendo Switch installment, Rhythm Tengoku is the original Japanese release, and Rhythm Heaven Fever is the Wii entry; none is the 2015 3DS compilation named in the question.

Megamix is often remembered as the series’ large anniversary-style sampler. It preserved the distinctive audio-first design of earlier games while making much of the franchise’s history available on one handheld system.