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.

Course layout
Racers start outside, in a mountainous, wooded environment. Going in a straight line, they enter a Warp Pipe and enter the pipe system. Racers continue driving forwards before approaching a wide left turn lined with a half-pipe. The pipe then serpentines, with every bend having its own half-pipe. Then, racers drive off of a glide ramp and may go through one of two pipes; a red one or a blue one. The red pipe takes racers to two right-angled left turns before taking them into a bendy white, transparent tunnel. The blue route makes racers go round a large right turn, before overlapping, and eventually taking racers on top of a moving green pipe that goes below the previously mentioned white tunnel. The white tunnel and the green pipe shortly take racers back to their respective red or blue pipes, before both routes meet up again in an orange section containing Fuzzies and Piranha Plants. Racers enter an underwater section before taking a large left turn, and finally leaving the pipes and returning outside, before driving down a brief straightaway to the finish line.

This course also appears as Piranha Plant Pipeline R, Piranha Plant Pipeline T and Piranha Plant Pipeline R/T. The R/T variant takes racers outside the pipes into the caverns.

Appearances
For this course's tour appearances, see List of Piranha Plant Pipeline tour appearances in Mario Kart Tour.

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.