For those looking to reconnect with the community, Sudomemo is a fan-made replacement for Flipnote Hatena that allows you to upload and view Flipnotes on original hardware or via browser.
However, I can offer alternatives:
Today, you cannot officially download Flipnote Studio for the original DSi or DS Lite. The DSi Shop is permanently closed. Consequently, owners of older DS systems or fans who want to revisit the software on their PC, Android phone, or flashcart turn to ROMs. Flipnote Studio Rom Nds Download
Flipnote Studio is a free software application developed by Nintendo for the Nintendo DSi and Nintendo DSi XL handheld consoles. It allows users to create and share flipnote animations, which are short, looping animations made up of 64 frames. For those looking to reconnect with the community,
: This is the leading fan-made replacement for the original Hatena service, allowing players with modded consoles to continue sharing animations today. Flipnote Archive How to Play Today Consequently, owners of older DS systems or fans
Sites like RomsFun host preserved versions of the software for use with emulators or flashcards. Reviving the Community: Sudomemo