A carriage-like vehicle with pretty wooden horses at the front.
(As for Toadette's friends and family, Toadia has a Green B-Dasher MK 2, Toadiko has a Dreamy Egg, Cream has a Bright Bunny in warm colours, Vanilla has a Flower Kart, and Tails uses his plane from Sonic and Sega All-Stars Racing.)
(As for the aliens, both Zem and Zam use a Team Oxide Kart, N. Trance uses a Team Trance Kart, Jason has a Comet Tail, and Oxide uses his hovercraft.)