The Dondai Supremo is a used compact car, which first appears in "Beach City Drift". Greg purchased it using a fraction of the ten million dollars from his contract with Marty, as it was a car he had admired greatly in the past. It is currently owned by Steven Universe as of Steven Universe Future.
Appearance
The car is a 2-door 1980s hatchback. Greg added a sticker on one of the back windows reading "dad on board," which is stuck over the top of another sticker reading "!!USED!!". The car's interior has five seats, a radio, and a tape deck.
Despite its stylized appearance, information revealed about the car in episodes that feature its appearance - notably Beach City Drift - describes it as an amalgamation of several 1980s Japanese compact cars. Its model name and handling reputation derive from the Toyota AE86 Sprinter Trueno, famously featured as Takumi Fujiwara's car in the Initial D manga and anime series. Overall its design can be directly connected to the Mk. I or II Volkswagen Golf GTI, but relevant to the Toyota reference, it's closer to the hatchback body of the AE86's successor, the AE82 Corolla.
Greg associates the Supremo with the 1980s, but Ronaldo recognizes Greg's Supremo as a 1996 year model. This may be connected to the Honda EF Civic, the Corolla's main competitor, which was produced in the early 1990s.
History
Greg has admired the car for decades. In Greg's photographs, he is seen attempting to share a plate of spaghetti with its grille until the salesman who owned the car stopped him.
"Beach City Drift"
Stevonnie drove it in a race against Kevin's Himitsu X-12, driven by Kevin. According to Ronaldo, the "true power" of the Supremo is its ability to drift.
"Last One Out of Beach City"
Pearl uses it to drive Amethyst, Steven, and herself to Mike Krol's rock show in Ocean Town. She successfully uses it to outrun a police car after running a red light, and also makes use of the car's ability by handbrake drifting into a hidden position behind a billboard. It remained there after it ran out of petrol.
Steven Universe Future
Steven is shown driving this car in the introduction and credits of every episode. He briefly uses it in "Little Homeschool" to drive Cherry Quartz from his house to Little Homeschool.