
dragonmaster
That is not really a helpful answer.

There was for the DSi, you needed to have downloaded a sudoku game from the DSiware shop, and run some sort of exploit. My understanding is that this was quickly patched, and I'm not sure if it ever actually amounted to much of anything. Even still, if this exploit did still work, you wouldn't be able to use it on the 3DS, its restricted to the DSi is my understanding.
There was for the DSi, you needed to have downloaded a sudoku game from the DSiware shop, and run some sort of exploit. My understanding is that this was quickly patched, and I'm not sure if it ever actually amounted to much of anything. Even still, if this exploit did still work, you wouldn't be able to use it on the 3DS, its restricted to the DSi is my understanding.

There are some savegame exploits for DS games but you have to be able to edit the saves.

