DS Software Sales in Famitsu Top 100:

• DS 2004 - 893.913
• DS 2005 - 8.790.117
• DS 2006 - 29.506.358
• DS 2007 - 27.093.419
• DS 2008 - 17.248.480

Switch Software Sales in Famitsu Top 100:

• Switch 2017 - 6.758.666
• Switch 2018 - 12.720.950
• Switch 2019 - 14.847.793

Famitsu 2020 Top 50:

NSW TOTAL: 17.245.204

In the Top 100 I anticipate that this year Switch will reach a total of about 22 million physical software. Around 40% of sales will be concentrated in four main titles New Horizon, Ring Fit Adventure, Momotaro & Sword/Shield which combined will surpass 10 million

Next year will be the Peak Software year we've seen so far on the Switch, mainly due to the much higher profile third party support.

Monster Hunter Rise is shaping up like it might be new franchise record in Japan, while Ring Fit Adventure and New Horizon will seemingly continue to attract new people to the Switch and have very strong sales in 2021. Just those three titles have a chance to surpass 10 million software next year. Combine their impact with evergreens and the strongest 3rd party support we've seen on the Switch thus far & 2021 is shaping up to be able to challenge the 2006 DS Peak. 

Overall the DS was a monster but it still had competition, which the Switch will lack in 2021 allowing it to reach a state of domination in the Top 100 not enjoyed by Nintendo since 1994. This lack of competition will also play into hardware sales, which I anticipate to be higher in 2021. 

Edit: Ok, I misread as 2021 > 2020 

2021 > 2007 is a bit  more tricky and depends on other high 3rd party titles other than MH

Keeping the original post here nonetheless 

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I'm in

No way in hell holiday 2021 won't be better than holiday 2020 with pretty much a mainline Zelda and a Pokemon game confirmed

I'm assuming MH crowd will be the big push here. AC was the definition of a system seller and so is MH

Many evergreen titles
AC and Ring Fit nowhere near saturation point
Bigger third party support
Stronger holiday/first party releases

Seems like a good shot for 2021 > 2020

Made a mistake should have been 2006 vs 2021

DS Top 20 2005

1. Animal Crossing: Wild World - 1.169.757
2. Brain Age - 1.011.341
3. Nintendogs - 965.665
4. Big Brain Academy - 875.371
5. Tamagotchi Connection - 770.391
6. Mario Kart DS - 669.575
7. Pokémon Mystery Dungeon - 521.380
8. WarioWare: Touched! - 505.254
9. Jump! Super Stars - 464.076
10. Super Mario 64 DS - 447.505
11. Clubhouse Games - 301.809
12. Kirby Canvas Curse - 276.418
13. Pokémon Puzzle - 215.038
14. Naruto: Ninja Council 2 - 212.655
15. Yoshi Touch & Go - 197.337
16. Dragon Quest Heroes: Rocket Slime 2 - 176.218
17. Pokémon Dash - 171.286
18. Dragon Ball Z: Supersonic Warriors 2 - 165.599
19. Super Princess Peach - 142.684
20. Naruto RPG 2: Chidori Vs. Rasengan - 121.321

TOTAL: 9.380.680

TOTAL HARDWARE: 4.151.356

DS Top 20 2006

1. Pokémon Diamond / Pearl - 4.302.815
2. New Super Mario Bros - 3.818.214
3. Brain Age 2 - 3.748.638
4. Animal Crossing: Wild World - 2.485.264
5. Brain Age - 1.991.116
6. English Training - 1.529.618
7. Mario Kart DS - 1.115.082
8. Tetris DS - 985.246
9. Final Fantasy III - 935.390
10. Common Sense Training - 916.600
11. Love and Berry - 778.734
12. Tamagotchi Connection - 713.237
13. Kirby Squeak Squad - 698.133
14. Cooking Navi - 691.007
15. Pokémon Ranger - 643.776
16. Dragon Quest Monsters - 633.084
17. Jump! Ultimate Stars - 548.474
18. Big Brain Academy - 455.557
19. Nintendogs - 442.223
20. Mario & Luigi: Partners in Time - 417.391

TOTAL: 27.849.599

TOTAL HARDWARE: 8.358.730

2006 was insane for the DS

• Peak Hardware sales of 8.35 million
• Diamond/Pearl surpassing 4 million
• 3 titles surpassing 3 million
• 4 titles surpassing 2 million
• 7 titles surpassing 1 million

DS Hardware Sales

• 2004 - 1.495.593 
• 2005 - 4.151.356
• 2006 - 8.358.730
• 2007 - 7.167.372
• 2008 - 3.946.585
• 2009 - 4.159.445
• 2010 - 2.872.621
• 2011 - 657.815

Switch Hardware Sales

• 2017 - 3.407.158 
• 2018 - 3.482.388
• 2019 - 4.493.885