No problem at all, your concerns are valid, it would really be a nightmare.
I'm playing the Windows version btw!
Oh, just a question, are we able to get the first part of the key as of rn? We get the second half easy enough but I asked someone if they got the first half after beating Mewtwo and they didn't, I just want to know if it's something that will come in future versions or if it's achievable already
you get it in the Giovanni event. If you get the letter, go back to Giovanni's room to deliver it, but then refuse to give the letter, you can get the item in the room if you win the fight.
however this path is bugged prior to version 1.2 (which I'm about to upload hold on), if you're playing in those versions please download an updated one!!! (the first half of the key is "WI--")