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I visited Jay-San's Discord, which features a channel just about Nomuras Tool / DS Pokemon Rom Editor. I had to scroll through a couple 100 messages, but in the end I found a single valid download link. :D
The google drive link I posted isn't the official download link by the way, the github is...
I have searched a lot, but I have finally found it:
source: https://github.com/NomuraRH/DS-Pokemon-Rom-Editor
application: https://drive.google.com/file/d/1TXsZi2PNELYrapJ3Mp-gLXoXvfdg-Zzk/view
Still many bugs, but it looks very promising. :D