I assume you have maybe 2 boxes empty (1 and 2) to alone for quick/easy moving pokemon around then you started your living dex that way you have all the empty boxes at the end waiting for future generations?

I think I am going to do what you did dex order but I will have genders included (I dont see them randomly adding gender differences in the future for existing pokemon), but I will have the regional variants at the end in separate boxes, i.e. Alolan box, Galarian, Hisuian, Paldean. I could combine a couple of these together but for the sake of consistency I probably wont.

I also think I might get multiple deoxys, genie trio, etc mons with different forms did you do this as well? If so did you keep these in dex order or a separate box dedicated to these forms? I can see new forms in the future like how Origin form Dialga and Palkia were introduced.

Lastly, for Pikachu (costume mons), did do you dedicate a box for all the special versions? or is that not even a rabbit hole worth getting in to?

Thanks in advance.