Nintendo's top-selling series / years since new, original installment (rounded):

1. Pokemon / 1
2. Super Mario / 3
3. Mario Kart / 6
4. Zelda / 3
5. Donkey Kong / 6
6. Smash Bros. / 2
7. Animal Crossing / 0
8. Brain Age / 1 (JP)
9. Kirby / 1
10. Nintendogs / 9
more...

11. Yoshi / 1
12. Wario / 2
13. Metroid / 3 (Fed Force), 10 (Other M)
14. Luigi’s Mansion / 1
15. Fire Emblem / 1
16. Splatoon / 3
17. Star Fox / 4
18. Excite / 11

19. F-Zero / 16 (JP)
20. Pikmin / 5 (Hey!), 7 (Pikmin 3)

Obviously, Mario Kart 8's remake is still selling -- but it IS remarkable that it's been radio silence on both Mario Kart and Donkey Kong for this long. These aren't just big Nintendo series, these are industry-wide mega hits. F-Zero isn't a top-seller, so it being dormant, ...

along with 1080, Wave Race, Excite Bike/Bots/Truck, and other racers isn't that surprising. It's also curious that Nintendo didn't try to release or revitalize a Donkey Kong Racing or Diddy Kong Racing game to tick both boxes.

I didn't count remakes/remasters or classic rereleases (Link's Awakening, Samus Returns, DKC), only new installments. These are a great way to practice franchise care, obviously. We'll see more, no doubt.

Small correction, Fed Force was 4 years ago. But it doesn't count, anyway.

Ok, fine. Not ranked, but very much cared for:
- Advance Wars / 12
- 1080 Snowboarding / 17
- Wace Race / 19

And if you're mad at those:
- EarthBound / 14 (JP), 26 (US)