The Koopa Clown Car is a small, circular copter with a clown face printed on the front. It is owned by Bowser, and is his primary mode of transportation. The Koopalings and Bowser Jr. have been known to use the copter at times as well, with Bowser Jr. having his own, smaller variant.
Bowser's Koopa Clown Car debuted during Bowser's final boss battle in Super Mario World. In the game, it carries the Koopa King, a captive Princess Toadstool, Big Steelies and Mechakoopas. It later made appearances in the Mario & Luigi, Paper Mario and Super Mario RPG series. Bowser Jr. later gained his own copter, the "Junior Clown Car", in New Super Mario Bros. Wii and New Super Mario Bros. U. Bowser Jr., and the Koopalings, use the Junior Clown Copter in the canonical Super Smash Bros. games that they appear in.