The latest PoPoLoCrois game released in 2015 / 2016 on Nintendo 3DS in all regions.
An unofficial, 20th Anniversary event held on October 29, 2016 in Tokyo and after that Marvelous wrote a strange Twitter message about the future.

According to it the CEO, Tetsuji Yamamoto wants a smartphone port version of the series. More information will be announced in 2017 January about the SP edition game. Until that, stay tuned!