Nowhere in there does it say it's copyrighted. And, once again, in the blog they point out that you can't copyright a string of numbers and letters, which is all the key is. Additionally, they point out that the key has been freely shared in other contexts for years.
Idk, man. Go read the blog. They consulted with an actual lawyer before making any claim. Unless you'd like to pit your law degree against theirs? Are you a Nintendo lawyer trolling Lemmy on the sly?
This is the funniest thing. It didn't go through Valve's lawyers. There was no DMCA takedown. They asked Nintendo if they were comfortable with Dolphin being up, Nintendo said no and claimed a bunch of legal things but never filed a legal request.
But whatever, dude. I'm done summarizing the blog for you. Obviously you want to act like you know what's going on without doing research and I'm tired of doing it for you.