I'm shamelessly making a similar thread to @curl-6 but I think this is also a topic worth discussing. Which Nintendo handheld after the Game Boy introduced the best franchises?
Game Boy Advance: Kururin, Golden Sun, Starfy, WarioWare, Rhythm Heaven
DS: Nintendogs, Brain Age, Big Brain Academy, Clubhouse Games, Personal Trainer, Fossil Fighters, Tomodachi, Art Academy
3DS: Steel Diver, Pushmo, Dillon, Fantasy Life
Switch: Arms, Labo, Ring Fit Adventure, Astral Chain
Please let me know if I'm missing anything. The IP in question needs to have at least two games, regardless of whether or not they had a worldwide release.
Lifetime Sales Predictions
Switch: 144 million (was 73, then 96, then 113 million, then 125 million)
PS5: 105 million Xbox Series S/X: 60 million
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima