*plows through some KH wikis as a refresher*
Jesus the lore for this series is convoluted. But it seems I was indeed mis-remembering the purpose of the Keyholes, excepting in KH2 when you had to unlock ones to access other worlds? But in KH1 you just needed a navigation gummi. But in BBS the tremendous trio can use the Lanes Between?
What even is the KH universe.