Rhythm Heaven Megamix is available on the Nintendo 3DS.
That said, he returned to provide new tracks to go with some rhythm minigames added to the compilation release Rhythm Heaven Megamix on the Nintendo 3DS.
Sadly, since Rhythm Heaven Megamix (released in 2015 in Japan and 2016 in the West), the series has been dormant for around nearly five years now.
Tsunku has been a composer for the Rhythm Heaven series since the first unlocalized game on Game Boy Advance and has been its main composer since then.