Dr. Jegue is a fumbling inventor and scientist, who in his spare time helps his friends Kiko, Sassá, and Quindim in a mechanic's shop. The four are great friends of Carlos Alberto, a stock car driver who suffers from the frames of rival Hugo and his gang. By doing scientific research in his mini-lab, Jegue discovers two powerful formulas: one extracted through the Quince tree, an abundant fictitious plant in the Northeast; and another that turns Dr. Jegue into a big, bearded, moody man with powerful strength. The Marmeleiro formula is tested in a race at the Interlagos Autodrome in the old track and the news of a "new fuel" becomes the main news of the country. Soon, buyers from all over the world come to Brazil to try to buy the formula, offering a lot of money for it, but Jegue, not ambitious, decides not to sell the formula anymore and leaves it in his country.
Unfortunately the movie O Incrível Monstro Trapalhão is not yet available on Disney Plus.
| Directing | Adriano Stuart | Director |
| Writing | Renato Aragão | Writer |
| Writing | Victor Lustosa | Writer |
| Sound | Remo Usai | Original Music Composer |
| Camera | Antonio Meliande | Director of Photography |
| Editing | Raimundo Higino | Editor |
| Production | Victor Lustosa | Production Director |
| Production | Hélio Ribeiro | Production Director |
| Production | Del Rangel | Executive Producer |
| Production | Renato Aragão | Producer |
