The Kaien I is designed by Captain Stern and built by him and his crew, including Tuga, the construction advisor.
Team Magma wants the Kaien I because they want to reach the Seafloor Cavern, where Groudon is.
Ruby lures Mack onto the Kaien I, where he defeats Mack.
DescriptionIt is a large submarine.
- It is also known as the Submarine Explorer 1