20m is not that bold tbh S4 in total has sold 14m while Brawl sold 13m I can see it hitting 20m LT just fine provided its a new instalment.
It is still bold. I mean it means it has to sell about 50% higher than the best entry. Thats alot. Pokemon still cant hit 20mil last 4 main entries despite selling 16mil-18mil. Also thats with pokemkn go help!
Not really because the situation on the Switch is far different than prior platforms for one the userbase is unified meaning a higher potential percentage for sales, Switch's momentum is attracting new people to the userbase which again increases potential sales and the attach rate on the platform is good, the sales of both Zelda and SMO outdoing prior games backs this.
Pokemon is a game that has been consistent yet static, while good it hasn't done anything prior to bring in new fans yet they've still managed 16-18m which is not far off from 20m compare that to the games before the series was hovering around the 10-11m mark so an actual increase has happened.