He was designed to resemble Boost.
Kabuto's grudge against Mater started when Mater accidentally ran into him after towing Ito San to Tokyo. After becoming extremely angry with Mater, Kabuto challenged the tow truck to a drift race. He tells Mater that he must race him to the top of Tokyo Tower, and whoever reaches there first will be crowned "King of all Drift Racers." He also tells him that the loser will be stripped of all modifications and become "stock." When the race begins, Kabuto tries to cheat his way to victory by constantly pushing Mater off the road, and when that doesn't work, he summons his ninjas to attack Mater. Fortunately, the ninjas are all defeated by Dragon McQueen, but it turns out to be a distraction so that Kabuto will reach the Tower first. When Mater is launched into the air by McQueen and lands on the very road leading up the Tower, Kabuto becomes furious and pushes Mater off the balcony, but Mater uses his winch to get back up and reaches the finish line at the top of the tower. In the end Kabuto loses and as a result he is stripped of his modifications and is last seen being laughed at by his own ninjas.
Kabuto makes a cameo appearence in Cars 2 However, for some reason he inexplicably got his modifications back despite what happened to him at the end of Tokyo Mater.