Question about the island Chemin Aroma

Hello, please tell me what so-called pass you need to show the person behind the red gate on the island to go further? Where to find this item? Thank you in advance.

Hello, the pass is available with a quest, after defeating the league
PS: Do you speak french ?

You must start a quest with an NPC (an elderly woman) on Final Island. She will then give you hints to see other NPC in the game (normally she tells you where the next NPC is). Follow the quest, if you have a problem, PM me or ask a question here, I'll check regularly.