The last Pokemon game I played was Y. It was largely the same game as Blue and Gold. This expands on the concept in fun, crazy ways, and it's got me intrigued.
To be fair, those were so simple that they were barely a challenge when I was 9 years old. When I played Y as an adult, they probably wouldn't have even felt like puzzles.
Doesn't come out of nowhere to my knowledge. It is quite anticipated game by many, as it was shown with trailers before on big shows. Everyone was wondering what kind of game this will be and everyone just knew it as "Pokemon with guns" where you can catch and slave other Pokemon like creatures. I'm actually surprised that so many didn't heard of the game before.