For 2018 it was:

Week 1: 159,636
Week 2: 31,189

For 2019 we had this:

Week 1: 225,698
Week 2: 83,136

But good luck with those numbers. In 2018 the numbers were affected by shortages, in 2019 we had NSMBU Deluxe releasing in week 2, so neither one of the previous years provides a good basis for an estimate, so some guessing would be mandatory.

Why dont we just get dangeki estimate for first week?

That would be:

Week 1 - 273k (Dengeki)

Week 2 - 128k (Famitsu Week 1+2 - Dengeki Week 1)

I'm wary of Dengeki's numbers though. They have PS4 as selling more in Week 1 alone than Famitsu have for Week 1+2 combined.

But that's still only a 6k discrepancy.

If Switch Pro and either new 3d Mario or BOTW2 releases this year then it has a great chance to outsell 2019 number.

Switch sweeps the top 10 and old Minecraft still comes in at #3. Damn Minecraft. Stop showing off already.

Not a fan of combined weeks like that but I'll take what I can get I guess. Bottom line is that the Switch is doing really good even without big software recently released or coming up in the immediate future.

Has Pokemon passed Splatoon yet? Or will it take another week?

Another week. No Splatoon 2 numbers this week but last week Splatoon 2 sales were at 3,280,215

Switch is holding better than last year despite no Smash boost? That's pretty huge imo