That would probably be best in one article, on the wiki for the smaller series.
Also, a little fact about that list, it only represents Nintendo-made series, but what if such a series exists that is exclusive to Nintendo consoles, but isn't directly made by Nintendo or one of it's developers?
I have a perfect example - the Ace Attorney series. It should speak for itself, it has 5 games, and an upcoming 6th, it has a wikia wiki as well, more. I think the game can warrant it's own wiki, and it's probably my greatest area of expertise concerning Nintendo series. (well that and Smash)