These are edited SpotPass BOSS files for the 3DS game StreetPass Mii Plaza "Puzzle Swap" that contains all the puzzles with different IDs
This BOSS data contains:
-All Puzzles available on EUR Mii Plaza (Tomodachi Life Friendship Fiesta)
-Unique JPN Puzzles (Daigasso! Band Brothers P / Rusty's Real Deal Baseball)
-Unique USA Puzzles (Rusty's Real Deal Baseball)
-Unique KOR Puzzles (Rusty's Real Deal Baseball)
-With a total of 1833 puzzle pieces + 45 limited-time events puzzles pieces
Thanks to tastymeatball for the original EU file and help, you can see more on his website http://wiiucodes.ddnss.eu to access needs a IPv6 (use Cloudflare IPv6 gateway https://one.one.one.one/)
Go to releases and download the file from the same region that your Mii Plaza
Ensure StreetPass & SpotPass are enabled in Mii plaza
Copy files to a new folder on the SD card, let's call it "Spotpass Data"
Go to FBI and select SD then go to the folder you copied
Select current directory and then copy all contents
Go back to FBI's main menu and select EXT Save data
Search for StreetPass Mii Plaza then browse SpotPass data
Select current directory and then paste (Replace all files if asked)