So basically, the Switch now has the fastest selling Zelda, 3D Mario, and now Kirby. If this trend continues with Pokemon... Oh god, that thing's gonna be a monster.
Ehhhhh .... not really.
Despite the fact that Pokemon Sun and Moon are literally the fastest selling games for Nintendo ever in the U.S. and Europe they are both expected to sell around the same amount of units as you'd expect from a Pokemon title. Of course, I think they would have sold about 2-3 million more than X and Y had Ultra Sun and Ultra Moon not come out ... but even then that was with a huge marketing push from a new mobile game, and X and Y was ALSO one of if not the fastest selling Pokemon game before that too ... just like how Kirby saw a gradual increase in appeal with Triple Deluxe and Planet Robobot.
In other words, it just seems like consistency in people buying games faster than before, and gradual increases in total sales. I do think that Pokemon Switch will have an increase in sales regardless, but it's not going to automatically be a monster if an article comes out saying that it's the fastest selling Pokemon in X and Y region.
Zelda fans are the worst