saw a video saying these pets will return..? is that bs or real?

my friend just sent me a video saying glormy leo, glormy hound, moonlight moth and singularity pisces will return... I just got a mr singularity pisces recently and it's gonna be absolutely worthless if it just comes back T-T

I've heard there are lots of accounts just saying stuff about adm that isn't even true tho so might be fake news? has adopt me ever brought pets back like that? I thought they only reall did that with the crystal egg, right?