Flow Ball

Flow Ball (Japanse: ノリ玉 Norikan)?) are pearl-like balls that can be obtained by getting a perfect in every rhythm game or clearing a challenge for the very first time 

A Flow Ball

in Rhythm Heaven Megamix. They can be used to buy some extra rhythm games at the museum shop instead of rhythm coins that cannot be found in the story mode. You get 1 Flow Ball per Perfect, and several Flow Balls depending on the difficulty of a challenge. A total of 144 Flow Balls is required to unlock all games.

List of purchasable games

• Bouncy Road (5 Flow Balls)
• Night Walk (10 Flow Balls)
• Quiz Show (3 Flow Balls)
• The Dazzles (12 Flow Balls)
• Big Rock Finish (3 Flow Balls)
• Karate Man Kicks! (8 Flow Balls)
• Built to Scale (8 Flow Balls)
• Double Date (10 Flow Balls)
• Catch of the Day (10 Flow Balls)
• Fork Lifter (8 Flow Balls)
• Love Rap (10 Flow Balls)
• Bossa Nova (12 Flow Balls)
• Screwbot Factory (4 Flow Balls)
• Board Meeting (5 Flow Balls)
• Samurai Slice (10 Flow Balls)
• Packing Pests (8 Flow Balls)
• Monkey Watch (10 Flow Balls)
• Karate Man Combos! (8 Flow Balls)