You can transfer specific games you just need to have both systems set up first. Log into the same account on both systems, go to system settings, data management, transfer your save data, send save data to another console, then pick the game you want to send, then same settings but receive save data on the new switch. There are certain games which do not allow save data transfers at all. You also can back up save data to the cloud if you have Nintendo Switch Online

I bought a new switch and it was an all or nothing transfer for me.

Yes, you can transfer save data for specific games.

Here’s a link on transferring over one account and leaving the other.

https://www.nintendo.com/sg/support/switch/secondary/transfer.html

One of the paragraphs mention how the save data on it works.

Save data is tied to each account. If you transfer your account to the new system, then save data associated with that account also gets transferred. If your son has a separate account, then his save data will remain on the old system.

How did you do the transfer?

Does your data tranfser if u link one account to a second switch?

Yes it's possible :) i used it for Arceus as well. I could explain how to do it, but a Google search for "nintendo switch transfer save data" should get you in the right direction.

Thank god I kept my old switch lmao I was gonna be sick if I had too start over ! Thanks for the thread

I did this and my saves got deleted from my old switch and never appeared on my new switch, for all of my Pokémon games.

It is possible to use NSO but I don't know how long the saves are kept if you don't keep NSO. AND some games like the pokémon games don't support cloud saves.

So the short answer is you can't for all. You have to make sure your relative or anyone else don't wipe your profile and its saves.

Nintendo Switch Online subsciption has cloud save backup for most games. Nintendo support has list of games that don't have NSO cloud save support/ https://en-americas-support.nintendo.com/app/answers/detail/a_id/41267

After an NSO sub runs out, nintendo holds onto your save data for 6 months. Within that 6 months, you just need to resubscribe to gain access to the cloud save data.

Code is not attached to your console. It’s attached to your account. Use the download code with your account and you can use it on any console you’re logged into. Go into the store on your first Switch, deregister that Switch, sign into your account on your new switch. You’re done.

Pretty sure you can do games individually if you do the physical transfer, where you hold the switches near each other and transfer that way as opposed to the cloud.

If you have NSO, they save are store onto the cloud but you could transfer saves over from your switch

Ok so apparently the transfer already copies data on its own, except for some games, that's good to know

Don’t take my word on this but I believe the system transfer automatically copies all data and keeps it on both with the exception of save data for certain games like Splatoon and Animal Crossing which are transferred to the new system and deleted from the original to prevent exploits. 

I did a full system transfer and it still leaves your old switch with all it's stuff on it except for those random games that don't cloud save like Pokemon and animal crossing. Only thing is all my games on my old switch don't have their virtual game card inserted so if you want to play digital games to boot them up you just have to do the virtual eject from the new switch and load it on the old one...I think

I transferred everything to my switch 2 and it didn’t factory reset the old one so I essentially had 2 copies of all the data. Another method is if you have a NSO subscription I believe it stores all your data online so you can grab it from there but I might be wrong.

Yes there is,under the data managment setting go to transfer save data.

Thank you for the responses! This may be a dumb question, but on my switch I have two profiles. Mine is the second profile, will all my info be transferred as well?

Super simple process! The most annoying part is having to log in to your Nintendo account a few times to do the transfer, log into the eShop, etc.

I really want the switch 2. It's too expensive for me. 🥲

Very easy process. Didn’t have any issues and my progress transferred right over

It's a relatively straightforward process. When you're setting up your switch 2, it'll give you the option to do a system transfer from your switch. Just follow along with the instructions.

From my recent experience, if you have Nintendo Online Subscription, its just simply a matter of redownloading back the save data from cloud. Log in your new Switch and everything should be there as soon as you sync up with the server.

However, if what you meant is game data or games downloaded from eShop, it is tied to the Switch. You need to format the micro SD card, and re-download the game from the new Switch. Just open your lobrary from eShop or through the main menu to view your list of purchased games.

You might want to be more specific with your question.

Without knowing your situation, I can only suggest you do another data transfer, just like how you transferred your data from the old Switch ot the new one.