: Once finished, the aes_keys.txt file will be generated on your SD card at sd:/gm9/aes_keys.txt . Where to Place the File
If you cannot dump your own keys, you need the "universal" keyset. As of this writing, the minimum working aeskeys.txt must contain: 3ds aeskeystxt work
If you have the keys and they still don’t work, check your ROM format. can play .3ds files if you have the keys. : Once finished, the aes_keys