Exploding Garrmondo Weiner Interactive Swiss Army Penis - A Link to the Past GBA-Question About Palace of Four Sword

I don't think this info is contained anywhere in any of the GameFAQs for the game, so I thought I'd ask here: does anyone know if you can enter the Palace of the Four Sword only in an LTTP game file for which you got 10 medallions in the Four Swords game linked to that file, or once you get the Medallions, can you enter the Palace in ANY new LTTP game file, regardless of whether or not it's linked to that Four Swords game? I know this seems like a roundabout explanation, but I couldn't think of any other way to phrase it. One other thing: can you delete the Four Swords game in which you got the medallions and still be able to enter the Palace in a new LTTP game (in other words, is the Palace permanently or temporarily unlocked?)? Is there anybody that knows anything about this? Thanks in advance.