Chugga-Boom is The Ant Hill Mob's car which appears in The Perils of Penelope Pitstop, it's the successor of the Bulletproof Bomb from Wacky Races. Chugga-Boom was voiced by Mel Blanc.
Although, at times, Chugga-Boom seems completely inanimate and was drawn without eyes on the headlights in early episodes, it became more articulate and developed a personality and a mind of its own, unlike the Bulletproof Bomb, which the Anthill Mob drove in the Wacky Races.