Super Bell Subway

Super Bell Subway is the third course in the Bell Cup. The course is included with the Animal Crossing × Mario Kart 8 downloadable content in Mario Kart 8 as well as the base content of Mario Kart 8 Deluxe. The course is located in the Golden Bell, a subway station, going through both the station and the track. This track only plays a half of the music when racing on the course, and the other half plays only when watching a highlight reel, the same way as Dolphin Shoals.

Course layout
The track starts in the station with a U-Turn going to the left right after the start. The track leads into a large area with stairs leading down into the subway. Automatic barriers open to let the players through.

The subway has trains running along the tracks. Throughout the subway, raised platforms can be used to drive on the trains. At the end of the subway, the train track splits and has stairs that lead up back into the large area of the station with another set of stairs taking the players to last bend before the finish. After the U-Turn is a straightaway to the finish line.

Shortcuts

 * Throughout the underground sections of the course, a Mushroom or a Star can be used over gravel sections cutting off turns in the track.
 * At the final U-Turn going to the left, a shortcut can be performed through a grass patch next to the Golden Bell Fountain with a Mushroom or a Star.

References to other Mario games
This track has several references to other portions of the franchise and even the game itself.


 * Several shops appear along the sides of the raceway that make appearances elsewhere in Mario Kart 8, such as Yoshi's Egg Market.
 * The map at the starting line of the track appears to connect nearly all of the raceways that appear in Mario Kart 8. Several other detailed maps by the subway lines also include the names of playable courses and the in-game business advertisements. Much like an actual subway, there are exits for different stations written on signs above the track stating the names of various courses.
 * On a related note, the city map is the only place where Wendy O. Koopa's company, Wendy's Car Interiors, is mentioned.
 * This track's music contains pieces of the underground theme from Super Mario Bros., much like 3DS Piranha Plant Slide.
 * World 1-2 from Super Mario Bros. is shown on the graffiti found in the underground section.
 * The graffiti also references Bullet Bills, Warp Pipes, Koopa Troopas, and a Piranha Plant; this is located before the World 1-2 graffiti under the ramp. The graffiti near the World 1-2 graffiti references the Koopalings.
 * The Toads in the ticket booth use feather pens designed after Cape Feathers, just like in Sunshine Airport.
 * The Coconut Café appears on the final bend before the finish line, referencing the shop of the same name in Coconut Mall from Mario Kart Wii.
 * This shop also appears in Toad Harbor.

Sponsors

 * 1-Up Fuel (Local information map (Exit C, D3), posters)
 * 1-Up Mushroom Car Insurance Group (Local information map (Exit A, A3/B2/B3/C4), posters)
 * 100% Organic Antifreeze (Local information map (Exit A, B2), posters)
 * BaNaNa Boy (Cans, local information map (Exit A, B3/C3))
 * Bob-omb Plugs (Graffiti)
 * Boomerang Bros. International Airlines (Local information map (Exit A, B3/B4/C3))
 * Bowser Oil (Local information map (Exit A, B3/C3))
 * Bullet Bill Speed Trial (Cans, local information map (Exit B, D3))
 * Burning DK Sports Drink (Bottles, local information map (Exit A, B4), vending machines)
 * Chain Chomp Racing Chains (Local information map (Exit C, D2))
 * Coconut Café (Shop)
 * Dream Gliders (Local information map (Exit A, A4))
 * Fountain Café (Bottles, posters)
 * Fun Flower (Shop)
 * Galaxy Air (Posters, poster featuring Toad in front of an image of GCN Dry Dry Desert, which reads 'Mysterious Sands. Dry Dry Desert', poster featuring Princess Peach in front of an image of Sweet Sweet Canyon, which reads "The Sweetest Memories! 'Sweet Sweet Canyon"
 * Green Service (Local information map (Exit A, B4))
 * Green Shell Taxi (Local information map (Exit C, D3))
 * Lemmy's Tire Service (Local information map (Exit B, C2))
 * Ludwig Painting (Graffiti, local information map (Exit A, A4)
 * Luigi Gusters (Local information map (Exit A, B3))
 * Mario Super Motor Team (Local information map (Exit A, A2/A3))
 * Mario Kart TV/MKTV (Posters)
 * Moo Moo Meadows Milk (Cartons, menus, stickers, vending machines)
 * Morton Construction (Local information map (Exit B, D2))


 * Mushroom Piston (Local information map (Exit B, A3/C2))
 * Paratroopa Airlines (Local information map (Exit A, A3))
 * Peach & Daisy Royal Patisserie (Bottles, menus, posters, posters featuring an image of Sweet Sweet Canyon)
 * Princess Orange (Bottles, local information map (Exit A, C4), menus, posters, trackside banners)
 * Rainbow Exploration Agency/REXA (Local information map (Exit A, B4), posters)
 * Red Shell Strike Equipment (Local information map (Exit B, D2))
 * Roy Smooth Sounds (Bottles)
 * Sunshine Parts (Local information map (Exit A, A3))
 * Tropical Bakery (Bottles, shop)
 * Undead Motors (Bottles, local information map (Exit C, D2))
 * Wario Billionaires (Local information map (Exit A, C2/C4))
 * Wendy's Car Interiors (Local information map (Exit C, D3))
 * Yoshi's Egg Market (Bottles, local information map (Exit A, A4), posters)

Trivia

 * Like Sunshine Airport, this track features a P.A. voice in the background that can be heard faintly. The female intercom speaks German, including several grammar errors however, and says general things heard in a German train station.
 * This is one of three nitro courses in Mario Kart 8 that doesn't have anti-gravity sections, the other two being Excitebike Arena and Animal Crossing, and the only one that isn't a crossover course.
 * It is revealed in a "Local information" map that the subway system is underground what seems to be the same town N64 Rainbow Road hovers over.
 * The map has a key showing the location of several companies mentioned throughout the game (like "Bowser Oil" or "Yoshi's Egg Market"), but "Morton Construction" is listed with a typo as "Moton Construction".