Submarathon is a 2 vs. 2 minigame found in Mario Party 5. The name is a portmanteau of the words "submarine" and "marathon". The song, In Calm Water, is a cover version of the Super Mario Bros. Underwater Theme.
The mini-game consists of 2 teams of two players, who must race to the finish riding Cheep Cheep-shaped submarines, one red and the other blue. The upper half of the screen shows the red team, while the lower half shows the blue team, and the divider contains a small, straight line which shows how far each team is from the goal. The first team across the goal wins.
The players much reach the goal by taking turns pumping the lever to accelerate their submarine; if a player gets tired, their movement rate will visibly slow down. Players should switch places at appropriate times in order to maintain their submarine's pace and prevent either one becoming extremely tired, though it is possible to reach to the goal quickly without switching at all.
Player Controlling Lever
Names in other languages