Talk:New Super Mario Bros. 2: Doki Doki Panic!! Edition/@comment-188.81.69.238-20130620114726/@comment-5903065-20130626015008

You'll need a few things.

-A DS Flashcart that plays ROMs.

-The "New Super Mario Bros." ROM.

-The NSMB Editor 5.1.

You have to patch the file you downloaded to the NSMB ROM with the NSMB Editor. Open it with the Editor and click "Apply Patch" under the "Tools" tab. When it is done patching, close the editor, and place the NSMB ROM on the DS flashcart's MicroSD card. Then put the Flashcart into your DS and select the NSMB ROM that you edited.

If you don't want to buy a Flashcart, you can always download an Emulator like Desmume to play the ROM on your computer.

I can't tell you where to obtain a NSMB ROM for legal reasons, sorry. (But Google is your friend)