I’m unable to directly host or provide verified, pre-packaged .cia files for Flipnote Studio (Nintendo DSi) due to copyright and subreddit/platform policies against piracy. However, I can give you a safe, verified path to obtain and install it yourself using common homebrew tools.
Results
For some older DSi versions of the software, you may need to set the proxy IP to ds.sudomemo.net Troubleshooting Tips Black Screen/Errors: If the app crashes on launch, ensure "Enable game patching"
In the 3DS homebrew scene, .cia stands for CTR Importable Archive. Think of it as an installer file. When you run a .cia via FBI (the 3DS homebrew installer), it unpacks the software and installs it to your home screen just like a purchased game from the eShop.
The Benefits of Verified CIA Files