KEMCO started a price cut campaign with the Nintendo 3DS version Alphadia and the Nintendo Switch version Legna Tactica in Japan. You can get the game from today (May 10, 2017) until May 24, 2017 for 500 Yen (with tax) and 700 Yen (with tax). The original price is by the way 1080 Yen (with tax) for both games. Here you can find the links: