When Lightning McQueen was in Ornament Valley, he saw Mater in front of the Rustbucket Stadium banging into a board. Lightning drives up to him and wonders what he's doing. Mater says that he's practicing for his big race, the Rustbucket Race-O-Rama. Then, Tommy Joe came and banged Lightning, as a way of saying hi. Mater asks Lightning to help them with their race, but he decides to sit this one out.
Later, Lightning got monster truck tires and raced the monster trucks in the Rustbucket Stadium.
After Stadium Race 1, Lightning reminds Mater of the English race car that he will be trading paint with in the Rustbucket Stadium. Mater was excited for it, until he realized that he wasn't ready, so he drove away to go practice.
Soon, Mater finished his practice and went to Ornament Valley to the Rustbucket Stadium. He was surprised to see that nobody was getting ready. Tommy Joe tells him that they've been sitting there since the last hour to watch the English rally car. The rally car, whose name was Emma, caught Mater's interest. When she looked at him, he asked his cousins to act natural and pretend to look like they're practicing. Emma laughed and said, "They've got their rock over us."
Mater and his cousins, along with Fred, had three races in the Rustbucket Stadium. Right before the 4th race, Emma ran into Mater. Emma apologizes, and Mater says he felt nothing. They then talk about his races and introduce themselves to each other. Soon, they had the race, which Mater won. After the race, Mater gave Emma a tour of Radiator Springs.
While Mater was playing with his tow hook in front of the Rustbucket Stadium, his old rivals, Bubba, Tater, and Tater Jr. came and reminded him of the time they planned to race for the towing rights of Radiator Springs.
Over the story, Tater and Tater Jr. were getting more attached to Mater than Bubba. After Bubba's Bucket Bash, Tater and Tater Jr. lost, but they thought they won, since they got a new friend (Mater), who won, and has a name that rhymes with theirs. Bubba got angry and drove away, saying he will get his revenge, even if it's the last thing he does.
Several races happen in the Rustbucket Stadium, and they're not only Rustbucket Derby events. There are also Guido Kart Race 2, Monster Truck Mayhem 1, and Monster Truck Mayhem 2. The Rustbucket Derby events include Smash Up 1, Smash Up 2, Smash Up 3, and Bubba's Bucket Bash.