The Cart Kiki model consists of a Kiki wearing a black helmet with ear holes who pilots a Bumper Car. Their Bumper Cars, which come in many different colors, have small turbine-like engines on each side of the rear and gray checkerboard patterns around them.
Cart Kikis are only encountered in Sonic's version of Twinkle Park. At first, they will rally around the starting point on the Action Stage's race course, but when Sonic gets close, they will try to run him over. Destroying a Cart Kiki pilot using the Homing Attack will leave its Bumper Car empty for the player to use.
On the race course in Twinkle Park, there will be Cart Kikis trying to stop Sonic. Getting hit by a Cart Kiki will damage the player. If the player has no rings, the Cart Kiki will kill them and destroy their vehicle. In return, the player can simply ram them with their own Bumper Car.
- Cart Kikis are one of the three enemy types in Sonic Adventure that do not contain any Animals, the others being Beats and Pirates.