Obvious answer: Pokemon franchise.
But then there is another game: League of Legends
I play it, and i seriously do not see it being alive for more than 1 more year. Literally every new champion we have got has had gamebreaking bugs (special mention to Azir here) that took forever to fix. The game also has a shit ton of botters and scripters that Riot is apparently doing nothing about. Everything about the upcoming content is being leaked. The game balance is terrible, only like 40 champions out of 120 are viable picks...
I think you get the point