Rhythm Heaven Megamix

Rhythm Heaven Megamix, known as Rhythm Paradise Megamix in PAL regions, Rhythm Tengoku: The Best Plus in Japan, and Rhythm World: The Best Plus in South Korea, is a rhythm game released for the Nintendo 3DS in 2015 in Japan and 2016 elsewhere, and the fourth installment of the  series. It largely consists of games taken from past installments, along with a plurality of new content. As with previous installments of the series, Megamix is a collaboration between Nintendo SPD1 and song producer (otherwise known as Tsunku♂).

While WarioWare and Rhythm Heaven have made occasional references to each other (most prevalent in Game & Wario), mostly due to being developed by the same team, Megamix solidifies the link between the two series by including a set of minigames featuring the cast of the WarioWare series.

Gameplay
Rhythm Heaven Megamix is a rhythm game tasking the player to play through a series of rhythm-based minigames played using the button, the  button, and the. Megamix alteratively offers a tapping control scheme using the, although it does not replicate the more elaborate touch screen motions from the DS Rhythm Heaven. Unlike other rhythm games, the Rhythm Heaven series has a stronger emphasis on testing the player’s sense of rhythm and will often subvert the visual cues during the course of the minigames.

The main story of Megamix is composed of 108 minigames: 78 taken from past installments, and 30 brand new. Several of the returning minigames in the early portion of the game have new graphics and music, and the games from the DS Rhythm Heaven have been reworked to use button inputs rather than the touch screen.

Wario... Where?
Wario... Where? (Made In Course in the Japanese script) is the name of the final two challenge sets in the Challenge Train mode, unlocked after all of Paprika World has been cleared (excluding the "Super Hard" challenges). Each sets have the player play through four minigames in succession, with the minigame’s original characters being replaced with those of the WarioWare series. Unlike other sets in the Challenge Train mode, Wario... Where? does not feature changes to the tempo or ruleset of the minigames, but it is the only set to feature new graphics.

Wario... Where?

 * Game 1: with Ashley as the tapper. Red appears to the left of the screen and provide instructions at the beginning of the game.
 * Game 2: with Master Mantis as the titular monk. Young Cricket appears in the background.
 * Game 3:, with Mike playing the role of the titular robots. Dr. Crygor and Penny appear in the background.
 * Game 4: with 18-Volt as the Wandering Samurai and 9-Volt riding on his back. Sal Out appears at the end of the game as the princess.

Wario... Where? 2: The Sequel

 * Game 1: with Jimmy T. as the third clapper.
 * Game 2: with Dr. Crygor as the photographer, as well as Tiny Wario, Dribble, and Spitz as the racers. Mona is part of the crowd that blocks the player’s view of the background at the end of the minigame, and Orbulon sometimes appears in the player’s photos.
 * Game 3: with Kat & Ana as the player characters. Mona’s scooter can be seen in the background.
 * Game 4: with the Reporter dressed as Mona and Wario-Man as the Wrestler. Mona herself appears outside of the Rhythm Arena.

Staff
Masami Yone, the director of Rhythm Heaven Fever, assumed the same role for Megamix. He was assisted by Takumi Hatakeyama, who previously worked as a programmer and designer for WarioWare: D.I.Y.  and Rhythm Heaven Fever. Ko Takeuchi returns as the art director, and Yoshio Sakamoto as the general producer. The music is done by Tsunku♂, who also serves as the game's producer.

Megamix is the final game developed by Nintendo SPD1. Following its release, the game development arm of Nintendo SPD would be merged into a new division known as Nintendo Entertainment Planning and Development.

References in later games

 * WarioWare Gold: A plush of Tibby (the protagonist of the game) can be seen during Mona's story segment. Mr. Sparkles' rank A character card states that "Mr. Sparkles goes to a gym known for its celebrities, like that wrestler who gets interviewed all the time.", referencing the Ringiside minigame and its Wrestler character. Dialing the code "CAFE" on the Phone souvenirs will give the player a message where someone explains that putting an Ashley doll in their Cafe lead to an influx of new customer, a reference to how an Ashley doll is placed on a desk of the Rhythm Museum in this game.