Okay, let's clear a few things up, and I'll try to be as nice as possible.
1) Daisy was the Princess in the Movie. Toadstool's real names wasn't revealed at the time (SML might have been out, and there was a Princess... who looked alot like Peach, who was named Daisy).
2) Peach did not hatch from an egg. Neither did Daisy, but that's debatable.
3) Was Peach adopted? Her grandmother was a 'shroom in SMRPG....
4) The Movie, is not cannon to some fans (Like me.), so therfore, we don't adhere to the Movie lore.
I hope that good. Now someone explain it all to me please. j/k -_- ()()()()()()()