Here are my ideas for 20 new tracks for Mario Kart. All of them will have 3 laps.
Luigi's Casino: A track going though a casino owned by Luigi, which you have to avoid falling chips on the ground.
Baby Playground: A track going on through a playground near a school.
Toadette Resort: A new track owned by Toadette. Players start driving on the road before going through a car park and then driving on the sand and then back onto the road again. Players must avoid traffic, Crabs, Cheep Cheeps, Cataquacks and Parasols.
Choco Lake: Very similar to Sweet Sweet Canyon from Mario Kart 8 except, it is filled with chocolate.
Peach's Castle: A track going through different rooms of Peach's Castle which is of course owned by Peach.
DK's Jungle Ruins: A new Jungle themed track owned by Donkey Kong, which you have to avoid Tiki Goons, Frogoons, Screaming Pillars and Klaptraps. This track also features DK Barrels.
Wiggler Forest: A new track set in a green forest owned by Wiggler, which you have to avoid Giant Wigglers but you can go though green leaf piles to reveal a Banana, a Mushroom or a Star.
Grassy Plains: A track based on the grassy levels from Super Mario 3D World.
Wario Factory: A track going through a factory owned by Wario. Thi