I know for those collection purists this is a nightmare, but for everyone else this is an awesome way to collect idols and get the AR icon for them too 
http://ar.essh.co/decks/kid-icarus
Since the last time I checked the site they've added a bunch of cards (from Revived Pit to Kid Icarus Float) - haven't tested if they're functional in game.
Region should not make a difference since I've used this site before and JP and US cards worked for me.
Don't ask about #405 and #411 though - maybe those cards are purposely left blank.
(remember to point the camera at the three colored window next to the affiliation symbol for the best chance of scanning quickly)
http://ar.essh.co/decks/kid-icarus
Since the last time I checked the site they've added a bunch of cards (from Revived Pit to Kid Icarus Float) - haven't tested if they're functional in game.
Don't ask about #405 and #411 though - maybe those cards are purposely left blank.
(remember to point the camera at the three colored window next to the affiliation symbol for the best chance of scanning quickly)