ZZXKL is the license plate number of a car who is arrested for double parking in a Bear on Patrol sketch seen in The Muppet Show episode 510.

He cannot speak English, but Patrol Bear and Link surmise that his name is pronounced "Zikskuhl." Since they cannot understand what he says, a police interpreter (played by Gonzo) is brought in to translate. After deciphering his native "tong" (which is accomplished via squashing Patrol Bear's nose with a large pair of steel tongs, making him squawk), the car reveals that he is a three-year-old imported vehicle who doesn't know where his driver is, but likes an occassional sip of motor oil. It's not his fault he was double parked.

An identical car appeared in episode 507 with Gonzo and the chickens for "Workin' at the Car Wash Blues," albeit with a different license plate number.