Ginormous is a monster truck in a few of the Cars video games. He doesn't talk. Instead, he makes growling sounds.
Ginormous is introduced in Monster Truck Mayhem when he, Count Spatula, and The Crippler challenge Lightning McQueen to a race. Lightning quickly goes to Luigi's Casa Della Tires to get monster truck tires. When he does, he races with the monster trucks.
Ginormous isn't a playable character and doesn't have other paint jobs.
Ginormous makes appearaces in the Monster Truck Waypoint Races. Again, he is not playable and doesn't have alternative paint jobs.
Ginormous appears in all 5 of the Monster Truck Races in Cars Race-O-Rama, except on the PlayStation 2. On the PlayStation 2, he doesn't appear at all. Like in the first two games, he is not playable and doesn't have alternative paint jobs.