During the first visit, the player can only travel between these three islands. After completing the story, the player can travel to any one of the three from Vermilion City's port, and back again.
Once the player has delivered the Ruby to Celio, he will take the player's Tri-Pass and exchange it for a Rainbow Pass.
At the beginning of this arc, Red and Blue each received a Tri-Pass left to them by Professor Oak, which they used to first board the Seagallop Ferry to the Sevii Islands.
