KARR (aka Knight Automated Roving Robot): KARR is KITT's evil older brother. A concept later stolen by Star Trek: The Next Generation for Lore, Data's evil older brother. KARR like KITT is a black 1982 Pontiac Trans Am. However, KARR is not as philanthropic as KITT and has to be destroyed not once, but twice in the series.
(Image courtesy of Wikipedia)