Check your 3DS! A SpotPass update is adding a new Kirby puzzle to complete and a free piece to get you started!
An update to the 3DS StreetPass Plaza introduced a new puzzle for 3DS owners to collect in the software's Puzzle Swap mini-game. A 40-piece puzzle panel commemorating Kirby's 20th Anniversary is newly available, likely timed to coincide with the July 19 release of Kirby's Dream Collection: Special Edition for the Wii in Japan. North American users are getting the Kirby compilation title in September.
Japan also received an Oni Training puzzle panel for the upcoming 3DS Brain Age sequel. The game launches there on July 28. Presumably, the panel will make its way to the rest of the world when the game approaches release in other regions.
All 3DS owners need to do to receive the update is have SpotPass activated for their StreetPass Mii Plaza software and have an internet connection for their 3DS. They'll receive a notification of the update to Streetpass Plaza, and the next time they enter the Puzzle Swap mode, they'll be given a random piece. There is a possibility that the piece a user receives for free is a StreetPass-only purple piece from the middle of a panel. In that case, the lucky 3DS owner will be a sort of "patient zero" for the viral spread of that puzzle piece amongst their friends since the purple pieces cannot be otherwise obtained through the use of game coins.