Clown Car

Clown Cars are a type of vehicle used commonly in Mario's World, particularly within the Koopa Troop. They're mechanical in nature, usually using a propeller to fly, and are recognisable by their expressive clown-like faces, though not every model of Clown Car has this feature. They come in multiple sizes, shapes and colours and have many peripheral devices.

Mario & Luigi: Partners in Time
The earliest Clown Car seen chronologically is Bowser's in Mario & Luigi: Partners in Time. He was seen using it to escape the Vim Factory with Kamek after he took two Cobalt Star shards from the Mario Bros.. Since it had the same appearance then as it does when Bowser is an adult, it's entirely possible that the Koopa Clown Car is the original Clown Car of its type, or even as a whole, and that its clown-like features were designed specifically for the young prince.

Super Mario World
In Super Mario World Bowser used his Koopa Clown Car in the final battle against Mario in the Valley of Bowser. Here it's shown that Clown Cars can hold multiple Mechakoopas and Big Steelies, as well as Bowser and Princess Peach, all at once. The Clown Car's face is also shown to seemingly mimic Bowser's emotions, such as how it cries when Bowser is hit.

Super Mario RPG: Legend of the Seven Stars
The Koopa Clown Car appears once again in Super Mario RPG: Legend of the Seven Stars. At the beginning of this title, Bowser used the Koopa Clown Car to kidnap Princess Peach from the front of Mario's Pad. It was later used again by a (species)Shy Guy when the Koopa Troop were making repairs to Bowser's Keep, to Bowser's frustration. Finally, it was used by Bowser during the parade as he chased Croco and a Crook after they stole from his float, before Booster managed to hijack the car while Bowser angrily ran behind.

Paper Mario
Many Clown Cars in many forms appeared during the events of Paper Mario. During Bowser and Kammy Koopa's attack on Star Haven at the beginning of this title, Bowser used his Koopa Clown Car to fly to Star Haven and take the Star Rod. He also used his Clown Car to break into Peach's Castle during Princess Peach's party, and to briefly escape Mario with Peach before the final battle.

Three Clown Cars were docked in the Hangar of Bowser's Castle in the final chapter of this title. A Clown Car propeller with three blades could also be seen propped up against the wall of the Hangar.

Medi Guys, found in Shy Guy's Toy Box during this title, used small, propeller-less Clown Cars with hearts on them that acted as ambulances.

When Bowser used the power of the Star Rod to put Peach's Castle on top of his own during Princess Peach's Party, he lifted them both into the sky with a giant, stone Clown Car. The sky arena that Kammy Koopa builds for Bowser's final battle against Mario is also a large, stone Clown Car with nine propellers and the ability to increase Bowser's Power.

Mario Kart: Super Circuit
Since Bowser's Castle from Paper Mario appeared in the background of Rainbow Road in Mario Kart: Super Circuit, the stone clown car allowing it to fly also made another appearance.

Paper Mario: The Thousand Year Door
In Paper Mario: The Thousand Year Door Bowser flew to Rogueport in his Koopa Clown Car once he heard that Princess Peach had been kidnapped. He also tried to use his Koopa Clown Car to fly to Glitzville after unsuccessfully attempting to get a ticket for the Cheep Blimp. His flight was cut short however as a warning light lit up inside the Clown Car and it fell out of the sky after coming to a halt. After plummeting into the ocean, Bowser left his Clown Car behind and swam back to Rogueport.

Mario & Luigi: Superstar Saga
In Mario & Luigi: Superstar Saga, Bowletta used Bowser's Koopa Clown Car to steal Princess Peach from Little Fungitown. Later on at Joke's End, Bowletta continued to use the Koopa Clown Car for transportation and to contain Princess Peach. When Bowletta and Fawful believed the Peach they kidnapped to be an impostor, they ejected her through the Clown Car's mouth. and grabbed the other Peach between the Clown Car's lips.

Mario Golf: Toadstool Tour
In Mario Golf: Toadstool Tour, Wario and Waluigi were chased by Bowser using his Koopa Clown Car after the duo gave him a black eye. Here the Koopa Clown Car is armed with two side-cannons containing explosives as well as Bob-ombs inside the car's bowl for Bowser to throw. Bowser also seems to be able to summon the Koopa Clown Car with just the snap of his finger.

On Hole 11 of Bowser Badlands, part of the course takes place on a giant Clown Car. This Clown Car looks almost identical to Bowser's, not accounting for size or the Golf Course built where the bowl's entrance would normally be.