Mudboat

Mudboats are small boats apparently constructed out of mud that appear in Super Mario Sunshine. They are just large enough for Mario to stand in, and can be moved by spraying water using FLUDD's Squirt Nozzle in the opposite direction of the mudboat's desired direction, pushing the boat using the spray's recoil, similarly to leaf boats. Unlike leaf boats, mudboats immediately sink if they come into contact with a wall, though there is a small window during which Mario can jump off to safety when this occurs. After being sunk in this way, mudboats reappear in the location where they were first found.

Mudboats first appear in Noki Bay, where they are rented out from a boat rental shop for 90,000 coins. However, the Raccoon proprietor of the shop allows Mario to use the mudboats for free. During Episode 1 of Noki Bay (Uncork the Waterfall), the boat rental shop's mudboat is adrift in the bay's slimy water, allowing safe travel over the slimy water from near the entrance to the area. Mudboats are completely optional to use in Noki Bay, though they can assist in retrieving a Blue Coin suspended over the water, as well as generally traversing the bay's water more quickly, particularly while it is polluted.

A single mudboat later appears floating in lava midway through Corona Mountain, and must be used to cross a large sea of lava filled with stalagmites. While the mudboat is unharmed by lava, it will sink when it touches any of the stalagmites or the water-restoring fountain in the center of the lava sea, requiring Mario to carefully steer the boat to the platform at the far end of the lava sea. This mudboat also assists in collecting nine of Corona Mountain's ten blue coins, which are located in a circle surrounding the platform at the end of the lava sea.