This is a tutorial for the retail games. My problem was step2.
The game won't recognize his own header.
1. Convert card1 to card2 with this tool:
https://filetrip.net/dl?deY8GQks8v
2. Use the Gateway Rom Patcher and use another private header.
3. Copy the game to the sd and start the 3DS
4. Start the game and press Up + X + B to erase the savegame
5. Enjoy!
The game won't recognize his own header.
1. Convert card1 to card2 with this tool:
https://filetrip.net/dl?deY8GQks8v
2. Use the Gateway Rom Patcher and use another private header.
3. Copy the game to the sd and start the 3DS
4. Start the game and press Up + X + B to erase the savegame
5. Enjoy!