If you can stomach wiping the saved data off your 3DS and starting over, you can reformat it with different countries/states to get the panels you want. Of course, you have to have a friend's 3DS nearby (or own a second unit) to pick up all the different streetpass hits and then have him streetpass them back to you.ferofax said:I did not set one before, so I got Metroid: Other M. So it seems i have to streetpass people with a different puzzle as me in order to unlock that panel? looks like i'll never get it all then. :/
It's a pain in the ass, but effective if two systems are handy.