super mario sunshine yoshi's island secret level

Despite the course being introduced in Mario Kart Tour around one month after its Booster Course Pass release, it does not have a classic course prefix in either game, and internal data marks it as a new course for Mario Kart Tour.

It is the second course to be introduced to the Mario Kart series in the Booster Course Pass, after Sky-High Sundae. It is a course that takes place on the island it is named after, with its music theme being an arrangement of the athletic theme from Super Mario World 2: Yoshi's Island. Hitting the switch makes red blocks appear, and jumping along those brings Yoshi to the end of the level.Yoshi's Island is a race course that first released as part of Wave 4 of the Booster Course Pass in Mario Kart 8 Deluxe, appearing as the fourth and final course of the Fruit Cup, and reappears in Mario Kart Tour, starting with the 2023 Yoshi Tour. At the top of the falling stones is a ! Switch. After the Middle Ring is a section with another Flatbed Ferry and some falling stone blocks. In the next area are some is a Flatbed Ferry that leads to another Middle Ring. If the player destroys some dirt at the end of the section, they will reach another secret area where they can get some more red coins. Through the door is just more clouds, and after crossing a long gap, Yoshi finds another door which leads to the next area. If the player jumps off the Flatbed Ferry at the right moment it will take them a secret area, where they will use a ! Switch to collect some red coins and a flower. He soon comes to a cliff, where he has to ride various Flatbed Ferries (many of which fall off the tracks shortly after being landed on, forcing Yoshi to jump around a lot), to reach the top of some clouds, where there is a Middle Ring and a door.

The level starts out with Yoshi in a small grassy area.

Super mario sunshine yoshi's island secret level