Released as Pokemon Comaster in Japan last year, the game was developed by a company that builds advanced artificial intelligence.
It's not clear why the game has been released with so little build-up or fanfare, particularly after the enormous success of fellow free-to-play game, Pokemon Go last year.
It's the latest in a line of Nintendo-branded mobile games, which will continue with the release of Fire Emblem Heroes on February 2. Joe Skrebels is IGN's UK News Editor, and this artificial intelligence will mean that a Slowpoke is cleverer than him. Follow him on Twitter.