You get a random one from the start. Once you get to that island, you search the island for an NPC with a unique model named Corless. He stands out like a sore thumb and is usually at the furthest point from the island's town. For example, on Seven Island, he is at the other end of Sevault Canyon. Talk to him and choose your next island, rinse and repeat.
how to get all sevii tiket island in the game
You get a random one from the start. Once you get to that island, you search the island for an NPC with a unique model named Corless. He stands out like a sore thumb and is usually at the furthest point from the island's town. For example, on Seven Island, he is at the other end of Sevault Canyon. Talk to him and choose your next island, rinse and repeat.