Technically, an event Regigigas distribution did happen for Platinum, but only in Europe, for some reason.
PKHeX has had no problem injecting the EU wondercard into US Platinum saves, and it is not flagged as illegal when claimed.
Final update; I reformatted the microSD card, reinstalled atmosphere and sigpatches, and everything (including game cards) works again. It must have been something weird with my old atmosphere configs...
I have rebooted the console, and game cards boot fine in Stock SysMMC. Plus the SD card is brand new and was purchased at a Best Buy store, not online.
1) 21.1.0 on both SysMMC and EmuMMC
2) 1.10.0
3) Nothing on my Switch is installed; all games are either carts or E-Shop purchases.
4) Combination of the sigpatches from this post and sys-patch
5) 1.5.9
6) All cartridge games; E-Shop games boot without errors.
I have never downgraded my firmware.
Just replaced the MicroSD card, and now I have a new problem: While my game updates now show up properly, I have lost the ability to launch games from the game card slot. Games purchased from the E-Shop boot, but physical games fail to boot with error 2002-1002.
I'm having an issue. Both my EmuNAND and (stock) SysNAND are on 21.1.0. After installing several game updates on SysNAND, copying the files from the "Nintendo" folder over, and running "Fix Archive Bit" from Hekate, every game I updated on SysNAND refuses to start on EmuNAND, instead claiming...
Well, the Gen 5 games had antipiracy where if they detected no response from the cartridge's IR sensor (in other words, a flashcart/poorly-coded emulator), your Pokémon couldn't gain experience points...