This is currently the most popular and comprehensive library for 3DS content. They host games, updates, and DLC specifically formatted for easy installation. You can visit the hShop website and search for "Stretchmo" to find the DLC for the USA region.
Because the eShop is closed, new players can no longer buy the DLC officially. This has led many to look for archived CIA files. Stretchmo 3DS (USA) DLC CIA
A file is a package format used to install games, updates, or DLC onto a 3DS console using custom firmware (CFW). This is currently the most popular and comprehensive
You must ensure the DLC region matches your base game. If you have the North American version of Stretchmo, you need the USA DLC CIA; otherwise, the game won't recognize the extra levels. Because the eShop is closed, new players can
Always ensure the base Stretchmo app is installed before installing the DLC CIA. Even though the base game was free, the DLC acts as a "key" to unlock the levels.
Since sharing direct download links to copyrighted CIA files is often restricted on major platforms, the 3DS community relies on a few well-known archives: