Sparky is an adventurous young car trying to find his own road through life. Despite his father's attempts to instill the virtues of restraint and caution, Sparky repeatedly follows the deceitful Diesel into problematic situations.
| Actor | Role |
|---|---|
 Corinne OrrSparky / Norbert (voice) | Sparky / Norbert (voice) |
| DDenise FinelliSpeedy / Diesel / Out-of-Gas Customer (voice) | Speedy / Diesel / Out-of-Gas Customer (voice) |
| GGlen GomezDaddy / Patrol Car / Flat-Tire Customer (voice) | Daddy / Patrol Car / Flat-Tire Customer (voice) |
| MMark SchelpGas Leech Son (voice) | Gas Leech Son (voice) |
| MMichael SchelpGas Leech Father (voice) | Gas Leech Father (voice) |
| GGrace SchelpGracie (voice) | Gracie (voice) |
| JJulia SchelpJulia (voice) | Julia (voice) |