How can Nintendo make their games big again?

[zorg1000]

1. Pokemon X/Y-13.68m
2. Mario Kart 7-11.89m
3. Super Mario 3D Land-10.68m
4. Pokemon OmegaRuby/AlphaSapphire-10.15m
5. New Super Mario Bros. 2-9.61m
6. Animal Crossing: New Leaf-8.8m
7. Super Smash Bros for Nintendo 3DS-7.25m
8. Mario Kart 8-6.74m
9. New Super Mario Bros. U-5.08m
10. Tomodachi Life-4.91m
11. Super Smash Bros. for Wii U-4.84m
12. Luigi's Mansion: Dark Moon-4.49m
13. Nintendo Land-4.39m
14. Splatoon-4.26m
15. Super Mario 3D World-4.11m
16. Legend of Zelda: Ocarina of Time 3D-4.03m
17. Nintendogs + cats-3.74m
18. Legend of Zelda: Link Between Worlds-2.93m
19. Super Mario Maker-2.91m
20. Animal Crossing: Happy Home Designer-2.77m
21. Paper Mario: Sticker Star-2.24m
22. Legend of Zelda: Majora's Mask 3D-2.23m
23. New Super Luigi U -2.22m
24. Mario & Luigi: Dream Team-2.01m
25. Fire Emblem: Awakening-1.92m
26. Donkey Kong Country Returns 3D-1.8m
27. Kirby: Triple Deluxe-1.77m
28. Wii Party U-1.75m
29. Mario Party: Island Tour-1.75m
30. Legend of Zelda: The Wind Waker HD-1.63m
31. Mario Party 10-1.46m
32. Donkey Kong Country: Tropical Freeze-1.39m
33. Yoshi's New Island-1.28m
34. Kid Icarus: Uprising-1.25m
35. Pokemon Mystery Dungeon: Gates to Infinity-1.24m
36. Hyrule Warriors-1.22m
37. Yoshi's Woolly World-1.2m
38. Pokemon Rumble Blast-1.14m
39. Captain Toad: Treasure Tracker-1.13m
40. Pikmin 3-1.03m
41. Fire Emblem Fates-1.00m
42. The Legend of Zelda: Tri Force Heroes-1.00m

Nintendo games are pretty big as is