Does anybody know how i could transfer Mortys from campain to muliplayer?

Im new to the game and i heard that there is a way to transfer Mortys from campain to muliplayer,im not sure its real,so can anyone confirm it please,and if its true,how do i do it

Can't really do that, unfortunately. Players were allowed to select a few Mortys to carry over when Multiplayer started a few years back, but that was the one time that happened, so you'll need to hunt down Mortys again.

Oh,Thank you for letting me know