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.

List of games that are needed to be bought

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