I have a pretty simple (probably stupid) question which I've been unable to find the answer to thus far. If I randomly generated two numbers from 0 to 65535, would they always work as a legal ID/SID pair? Could any combination of two numbers between 0 and 65535 be legit?
I've been making some G3 Pokémon in PKHeX recently, and I randomly generated numbers for the ID and SID of their OTs. But I'm worried that, since I don't know what the RNG process is for those numbers in the actual games, the pairs I've generated might not actually be possible in-game.
If need be, I'd be fine using ROMs of the games to get for-sure legit IDs and SIDs. But I'd prefer not to, if it's not necessary.