Amazing work, do you remember if you edited the "Mario & Happy" files or were just copied from your spotpass folder? We found another limited time puzzle, but we need more info. DM if you remember anything.
What you have here is rare- the EUR Spotpass dump on archive.org doesn't contain Mario & Happy! Thank you very much for uploading this.
I put a comment on the archive to mention your Spotpass data- hopefully if you're willing, perhaps this dump could replace the existing one as it's more complete?
last 3 blue lanky coins are in the underwater cave at the lighthouse. They're to the left once you enter it, then go get the hidden dirt mound at fungi forest to get 814 coins
Ah, yes, portrait mode, surely the best way to film a row of people. If only there were some way to fit a wider shot, at the expense of height... if only...