Does anyone maybe know why?
From what I remember (seeing as it’s been years since I last played FFI), Whisperwind Cove was one of the four ‘Soul of Chaos’ dungeons originally added in the GBA version. From what I understand, to unlock it you have to be at the end of the game (in other words, you had to have defeated all four elemental fiends – Lich, Marliath, Kraken and Tiamat) – and doing so will unlock all four of the dungeons which make up Soul of Chaos, of which Whisperwind Cove is one of them (affiliated with Tiamat, being wind).
Hopefully this has helped. 😀
yeah i know that and i defeated all four of them but still can’t enter it. 🙁