Okay, so. To make a playable file, be it on an R4 card or emulator, do I need a specific ROM? Or can it be any okaeri chibi-robo happy richie ōsōji ROM? What are the steps to to patch it with the "patch.xdelta"
I basically need a "How to guide" for dummies just like me who might not be as familiar with the process of DS patching.
Thank you very much.
There is only one ROM of the game (the original Japanese), and yes it is needed. Use the tool (xdelta for windows, multipatch for mac) linked in the first post, which is very easy to use, to apply patch.xdelta to it.
It works fine on both flashcards and emulators (at least desmume).