Hey guys, seeing the filename "field_encounteffect" in your post really excited me.
Because I've been investigating why the checksums of my two Japanese Pearl rev0 cartridges don't match the data from nointro.
After unpacking and comparing them...
Great video!
There was also a rather famous incident related to FlashMe that happened at the time, which can be added.
We now know that Wi-Fi settings are saved at the end of the DS firmware, but this wasn't known when Nintendo hadn't released DS...