sora10pls

Has already been reported and fixed for some time, please ignore the check and wait until the next release. https://github.com/kwsch/PKHeX/commit/0b5116f5677d244fc4de9ebb68cfd1cfc46d7dd1

This has been fixed since ~13 days ago (just after the last release). You can ignore that invalid check until the next release.

Melmetal isn't available in any games until LGPE. Your PK8 probably has bad data, so if you can, please share it like the above post says. I'm unable to replicate this with any Melmetal (transferred from LGPE legitimately or hacked into SWSH).

You can convert your past-gen Pokémon to PK8s in PKHeX temporarily to view the Shiny Xor. Hover over the Pokémon's PID to see it (0 is Squares, 1-15 are Stars). It will also show the type of sparkles in the top-left corner (yellow Square or red Star). PKHeX doesn't currently show the Shiny Xor on hover outside of Gen 8 save files. If a Pokémon is Shiny and was met in a Fateful Encounter, its Shiny sparkles will always be Squares regardless of PID, so most Event Pokémon will be Squares instead of Stars.

On top of what's been posted above, do note that the file you've provided isn't valid save data. Opening in a hex editor shows that every byte is just 0xFF.

There won't be a way to have those Pokémon be legal until the future. Unovan Darmanitan, while in SWSH right now, is unobtainable without HOME releasing in February 2020. Nidoran♂ is not available in SWSH and will be a part of the patch that'll release come the time The Crown Tundra DLC releases in Fall 2020. PKHeX correctly flags these two as illegal since, as of now, they're unobtainable without cheating.

Expected filesize: 1,513,139 bytes Your filesize: 1,513,091 bytes Not a PKHeX problem, make sure the save gets dumped correctly before loading it into the program.

You should only be making these types of posts about games that you legally own and are having issues with.

Click "OT:"

Your build of the program is severely out of date. Please update to the latest build by following the instructions in the original post before saying the program doesn't work. Current main GUI looks vastly different from the one in your video:

Not currently implemented. Edit: This has since then been implemented.

Use LayeredFS with your CFW (would recommend Atmosphère). Once you're done making your edits, pkNX generates a folder named after the game's Title ID which can then be moved to your SD Card in the proper location, depending on your CFW. If we use Atmosphère as an example, you move the Title ID folder to sd:/atmosphere/titles/ 010003F003A34000 = Pokémon: Let's Go, Pikachu! 0100187003A36000 = Pokémon: Let's Go, Eevee!

Obtained a clean GARC, removed trade evolutions, and got a Popplio to Lv. 17; it evolved as intended. Still unable to replicate even in-game.

Unable to replicate using the latest build, Popplio still evolves at Lv. 17 after removing trade evolutions. Make sure your Evolutions GARC isn't corrupted somehow.

"The Grass-type Pokémon", "The Fire-type Pokémon", and "The Water-type Pokémon" are all flavor text when choosing the starters; this does not reflect their actual Types and pk3DS does not update this. pk3DS already warns users about this. If the user decides to ignore the warning, it's their fault, not the program's. No, pk3DS does not force Legendary/Mythical Pokémon if those checkboxes are checked, it simply adds them to the possible randomized species. Dump your game's update data using GodMode9, decrypt/extract it, and overwrite your existing ROM dump with the extracted contents of your update data dump.