Shop

You can use coins earned in the game to get music, items, and additional rhythm games from the in-game museum. The Shop (ショップ) is a place at the Café in Rhythm Heaven Megamix, which opens after the player clears The First Gate. Here, the player can purchase various things from Saffron.

Rhythm Item
Rhythm Items can be purchased with Coins. Each item can be viewed by going to the resepective game at the Museum.

Music
Music can be purchased with Coins. Each song can be viewed by going to the resepective game at the Museum.

Rhythm Game
Rhythm Games can be purchased with Flow Balls, which can be obtained from Challenge Land. Each game is accessable only at the Museum after purchasing. If the player buys all the Rhythm Games and goes to the shop, Saffron notes that there's nothing left to buy with Flow Balls, and converts the Flow Balls the player has into 30 Coins each.

Trivia

 * Rhythm Items and Music don't appear in the shop until their respective Rhythm Game is cleared. All Rhythm Games in the shop are available from the start.
 * Four of the Rhythm Items are unavailable at the shop, as they are obtained though a High Score on the Endless Games instead.
 * Even after the player has purchased everything from the shop, they can still enter the shop screen.
 * The Rhythm Heaven Megamix Tips & Tricks page on Play Nintendo incorrectly suggests that the items bought from the Shop are obtained from the Museum instead. They are actually viewed at the Museum after purchase.