S.S. Aqua

Fast Ship S.S. Aqua, commonly referred to as simply the S.S. Aqua or Fast Ship, is a ferry service that runs between Johto and Kanto. It is one of the methods of transportation between Johto and Kanto in the Generation II and IV games, alongside the Magnet Train, walking, and flying or teleporting. It travels between Olivine City and Vermilion City. A player can only travel on this ship after defeating the Johto League.