I think Lapras will come back to the beach area and you can talk to her to go, but I haven't played the game in a wile...
No. Because it is hidden. The Pokemon do not know such a place.
there are 15 floors in the hidden land.
Go to the Hidden Land
there the "x-ray specs" and they reveal hidden stairs and items
15f and 8f in the deepest part.
In Pokémon Mystery Dungeon: Explorers of Sky, the Silver Veil can be found in the Hidden Land. Specifically, it is located in the dungeon called "The Hidden Land," which is accessible after completing certain storyline events. You will need to navigate through various floors and defeat enemies, and the Silver Veil is typically located on one of the floors within this dungeon.
It doesn't have a limit. Even after you go into the Post - Ending, you will still be able to enter it.
wonder mail
24 floors
After Blizzard Island in "Pokémon Mystery Dungeon: Explorers of Sky," Sunflora can be found in the Hidden Land, specifically in the area called the "Sunflora's Camp." To access this location, players must progress through the storyline and complete specific missions. Once you reach the Hidden Land, you can find Sunflora near the entrance to the area dedicated to her.
after you defeat him the first time in primal form go through the whole hidden land and temporal tower a stuff AGAIN and he is there. primal dialga is impossible to get
it can be found in any dungeon except the really easy ones but if youre in a hurry the best place is crevice cave or hidden land