Luigi Circuit

Luigi Circuit is a series of racecourses from the Mario Kart series, named after Mario's brother Luigi. This course, in one form or another, appears in the majority of Mario Kart installments and, excluding the course from Mario Kart: Super Circuit, is among the simplest tracks in its respective game. Even though they are usually among the easiest tracks, they differ in size, features, and obstacles.

History
Luigi Circuit has appeared a few different iterations throughout the Mario Kart series.