Your Flipnote Studio ID is a 16-digit ID that identifies your account on Nintendo DSi and account on Sudomemo.
Occasionally, we may ask you for your ID. This is how you find it in Flipnote Studio:
1. Tap the wrench icon in the top-right corner of Flipnote Studio's main menu to open your Settings.
2. Your Flipnote Studio ID will be displayed on the first page of your Settings.