This happened with my friend group and Deathly Hallows. We all read a fake leaked copy before the book came out and made our own personal injokes, like how insane it would be if Harry broke into the Bank and just started flinging Unforgivable Curses at random goblins, or if ANYTHING bad happened to us we'd say *Oh no, Dobby!" and someone would follow up with "We spend two full chapters mourning Dobby."
it was not a fake leak
dress the bat in a series of pride socks so it cycles through them all if they keep grabbing the bat