>>28784070In the past, I used to use the following method to inject Pokemon into my games:
>Use a wondercard editor to create a wondercard (.pcb?) file containing the hacked Pokemon I wanted>Use WCDPatcher (for D/P/Pt) or 12distro (for B/W) to inject the wondercard into one of these Distro ROMs (either Deoxys for DPPt or Liberty Ticket for B/W)>Run the ROM on my flashcart, etc, etc as detailed earlier to receive the hacked 'mon on my game as a wondercard.This was after the GTS method stopped working, but don't ask me why I didn't just edit a savefile and run a game ROM and trade the 'mons over, I honestly can't for the life of me remember. For some reason at the time this seemed to be the only way to do it.
TLDR; to answer your question, the wondercard the Distro ROMs contain can be changed by either using WCDPatcher or 12distro but, to my knowledge, that's as far as hacking them has gone (although I'm not sure what else you could really do).
WCDPatcher:
https://filetrip.net/nds-downloads/utilities/download-wcd-patcher-1-44-f24413.html12distro:
https://gbatemp.net/threads/pok%C3%A9mon-duodecuple-distribution-hack.285080/I always preferred 12distro since it let you inject 12 Pokemon at once. Can't remember what I used for HGSS, I think it was just WCDPatcher.