I even put a bigger version of my old Avatar on the 3DS that was way bigger then the screen and it worked. back then Too.
This Screenshot is also viewable with the 3DS Cam http://puu.sh/3KOw1.jpg (Faking things is fun!).
And downloading pictures from the 3DS browser also works for bigger pictures however the maximal Resolution is met quite fast.
Anyway updated first post since got few Information from the US site of this function. This website works with every region and has same QR code.
Also no words about other games working just ACNL...

This post has been edited by Tibia821, Wed, July 24th, 2013 at 20:22