>>10918291
Easiest method to finish Puzzle Swap, sadly, is gaining enough Play Coins and gambling on each panel until completion.

Prepare to see the SAME COMPLETED PANEL get chosen and filled at 5 random times.

Recommended strat is simply...

- homebrew your 3ds first
- find the "300 play coins" homebrew app online
- press everytime your coins are low
- gamble away at Streetpass Puzzle Swap

Lame methods, but that's the reason I completed it.