True, but different than normal bundles since Sony includes the cost of the game in the bundle. 

I'm pretty sure all PS5 bundles so gar have been like that.

I remember really well what the boost was for splatoon 3 however :

1. it wasn't as big as was with some of the big titles in the last 3 years, see animal crossing for example, launched and the switch got boosted to 800k for the week

with splatton what ? only to 400k.. Also the effect from animal crossing was way more weeks and bigger numbers the weeks after.(this is just an example is other cases too.)

2. There may be stock issues before however in the previous years most of the weeks in the year have been triple digits not double. And numbers close to 100k were much more seen through all the year than now.

As I already said software can give some boost to Switch numbers, but not as big as before and not so prolong as before. Of course now with the holiday season will be a little bit more difficult to separate the boost effect from pokemon than the normal holiday boost that Switch would have either way. It saturation point hits. And it's absolutely normal.

3. I am not talking only about the 40k week and 30k week, I am talking in general. Comparing the year and weeks numbers to 2021 2020 and even 2019, it's clear that Switch has went a path downwards, and it will only get more and more noticeable with time moving on. As I said I expect no more than 3M for 2023 for japan.

4. On your question - maybe that will be the fluke strong week I talked about, Maybe it can reach 200k that week or the week that Pokemon is launching. Other than this I expect holiday weeks between 100 and 150k for japan.

Done. Except for all 3 current gen consoles.

https://gamrconnect.vgchartz.com/thread/246882/predict-console-sales-for-november-and-december-japan/1/

Nintendo Switch shipment in Japan in the July-September quarter were 1.01mil.
Famitsu has it from July 4th to October 2nd at 1.161.839 units. Way overtracked especially when also including the MyNintendostore sales that Famitsu doesn't track.
Nintendo's total shipment to Japan is 26.96mil, to which Famitsu is closer than Media Create.

It is not overtracking. Just leftover shipments being sold. Nintendo and retailers always kept a certain amount of supply in stores, but now they both have agreed that sales are slowing so smaller shipments are sent.

They wouldn't have over 200k units as leftover. Another thing when comparing total numbers from Famitsu and Nintendo is that based on Famitsu's numbers the MyNintendostore sales would be negative this last quarter.

This observation was made by @Hiska-kun on Installbase.

Also them sending smaller shipments on purpose doesn't make sense when they literally had stock issues with completely sold out stores. Nintendo says they have semiconductor shortages.

Smaller shipments are to be expected, since Nintendo already expected numbers to be down YoY before their adjustment this quarter.

Do we have definitive proof that Nintendo doesn't provide Famitsu with MyNintendostore numbers?

Famitsu and Media Create numbers have always been lower than Nintendo's especially when there are shortages. They have never reflected MyNintendostore sales in any capacity. Apparently 2017, 2020 and 2021 the sales on that store were particularly high and Nintendo's shipments were accordingly higher than what the trackers reported.