Urchin Underpass

Urchin Underpass is a battle course that will appear as one of the new maps in the upcoming Mario Kart 8 Deluxe. The map is based on the main Turf War map from Splatoon and contains elements from that game, such as several ink splotches scattered through out the course, as well as Mario Kart elements like Boost Pads. Driving on the ink does not affect players' speed. There are various paths that all loop around to the main area and several bridges. The music is a variant of the "Splattack" theme played during Turf War matches. Like with the Hyrule Circuit and Animal Crossing race tracks, the item roulette sound effect is a unique one to this course.

Trivia

 * This is the only nitro battle course based on another Nintendo franchise.
 * This is the third course in the game to have a different music track when the timer has one minute remaining, after Big Blue and Mount Wario, which also have different a music track during their final lap.