This process requires a with Unlaunch and GodMode9i (or dumpTool). Here’s the safe, legal route:
and made unreadable by software. This meant that even if you could run custom code, the key to decrypting games was literally invisible to you. Why It Matters Melonds Bios Dsi
You need a (using Memory Pit or similar exploit) and a tool like DSi NAND Dumper or fwtool to extract: This process requires a with Unlaunch and GodMode9i