I fixed it, thanks for trying to help!
I reinstalled the game and used the titleid "00040000001b1700" for the folder instead of the other one, for anyone having the same problem.
EDIT: don't do that, actually! I think I installed the trailer or something instead, but the patch did work. Kinda. It replaced the spotpass text but then it crashed, then I disabled it to try launching the game without it and it's just like a demo theater mode. oops.
e2: the first issue was because the game was on 1.1, I guess. It's fixed now, demo files running on 1.0 with no(probably) issues!
e3:BTDUBS here's a bad full(probably?) and broken(hope not but probably) translation of the game. UI/Layout should be crystal perfect because it's straight from the demo, same for the first world, but after that it's really terrible and amateurish lol
EDIT 4: If you talk to the worried explorer in the Traveler's Hub he crashes your game so don't do that lol
E5: It might be fixed lol idk tho here's an updated file (also you have to guess on the mii parade quiz 'cause names just show up as <NULL> half the time btw)