DUsing the "Fly" menu on Debug Island asks you for five different inputs. These inputs, when valid, will teleport you to various areas within the game. The below is a list of valid areas. (Note: This is an in progress list)
Mamariana Debug Room
Second Round Room in Right Hall
Middle path, to Constalation room
Only accessable on Disc 2 due to missing a cutscene on Disc 1.
NTSC/U-C and PAL versions reference a DB_01_U, likely used for localization. However, it was removed from all versions.
Cemetery (To Otherworld)
Pathway to Amon/Alice
Door of Desires 1
Door of Desires 2
Door of Desires 3
Train within Yuri's Soul
Normally unexplorable but cutscene does not play during "Fly!"
Unused in Directors Cut, as the scene is pre-rendered
Nahash Temple Debug Room
Can teleport, set flags, and view scenes from here
Hallways of the Second Floor
Unexplorable. Will always either enter the boss battle or view the ending scene upon entering, and teleport you to St. Margarite.
Only available in the Directors Cut version of the Game. References to these areas exist in the NTSC/U-C and PAL versions, but were removed before release. No references exist in original NTSC/J version
Plays the opening scenes
Debug Room for Dog Shrine
With Pedestal (To Blue Room)
With Pedestal (to Entrance)
With Pedestal (To Red Room)
When spawning in via "Fly!", it places you where the north entrance should me. As a result, you cannot move.