>>52428237Right, so unless item cloning is canon here is how it might work.
Send one master ball into the time hole.
Master ball just has to land on a Pokemon to work.
Master ball is likely fucked in a way where it comes back to the time they are sent from. A process a human cannot do.
Ball comes back, rewind the machine so empty ball also comes back and repeat.
As for the issue of what the time machine actually does we have an in series example.
Ultra wormhole, which we know can send people not just to the past and future but alternative ones.
My guess is that the dlc will reveal that the time machine is more of a worm hole machine. Will let us catch the new paradox pokemon and ultra beasts\other legendary pokemon similar to the dlc raid place. You can already access the time machine room post game but nothing is there. Yet.