If you can send a copy of a wild-caught Pokemon (that originated from that particular save file) to a Switch title, you can trade it to someone who has the ability to check there. You can ask in the simple questions/requests threadThis is a very long shot: after a long hiatus, I recently started replaying an old copy of Black 2 (cartridge) and would like to RNG shiny legends, but I never checked my SID before Pokecheck went down.
Is there still a way to retrieve my SID? I do have all the later generations, if there are more options there, although I'm not tech-savvy enough to use external tools like CFW or PxHex, which I saw recommended during my search. Thanks for any advice!
Edit: See you already got a reply. For whatever reason the forums didn't load the recent messages on my side till after I posted..

