Since I have gotten back to playing Pokémon main series games recently, I've been hearing about another franchise that's similar to Pokémon called Yo-Kai Watch (this franchise has both an anime and games). I actually first found out about it when I first went into GameStop to inquire about buying Pokémon X/Y and OR/AS.
So my question is this: what is Yo-kai watch exactly? When did it all start (games and anime)? How similar is it to Pokémon? What is its main concepts overall? I've been told by a GameStop employee that that particular franchise is popular as well (I'm not sure if he meant both the anime and the games but being that we were in a game store, I'm assuming he's speaking more about the franchise's games); why is it popular? What is Yo-kai Watch's appeal?
I'm so confused about this franchise and I want to have more background on what it's about before I make a decision of adding this franchise as a franchise to follow (to see if it's worth investing time and to see if I think it'll be entertaining to me).