Piranha Plant Pipeline

Piranha Plant Pipeline is a course from Mario Kart Tour, making its debut in the Pipe Tour. As the name indicates, it is an underground network of Warp Pipes with Piranha Plants spread throughout the track. It is the second course introduced in Mario Kart Tour to be named after Piranha Plants, with the first being Piranha Plant Cove, not counting its variants. The course is a favorite of Red Koopa (Freerunning), Pauline (Rose), Penguin Mario, Dr. Mario, White Tanooki Mario, Pauline (Cowgirl), Petey Piranha (Gold), Yellow Shy Guy (Explorer), and the Gold, Goomba, Brown, and Wiggler Mii Racing Suits.

Excluding courses released simultaneously, this course and Squeaky Clean Sprint mark the shortest period of time between the release of two new courses for the Mario Kart series, with only a 5-hour gap.

Trivia

 * The course's appearance and concept are similar to that of the unused "dokan_course" from Mario Kart DS, both being named after Warp Pipes and themed around their traversal. However, its layout is considerably different.