Ernesto is a Hispanic male with black eyes and dark brown hair, mustache, and goatee. He wears a green military style uniform with red accents on the shoulders and cuffs and he tucks his pants inside his knee high boots. He also wears a red beret.
Ernesto is an idealist revolutionary and regularly protests individuals, institutions, and corporations for the atrocities they commit against mankind and the environment. However, his commitment to protesting itself often outweighs any specific concern he has, resulting in his protests covering several different topics, including frivolous ones.
Scooby-Doo! Mystery Incorporated
Daphne met him while he was protesting at the Blake Family Center for Self-Named Buildings. Later he protested against Professor H.P Hatecraft confession about Char Gar Gothakon, and showed a song to explain why. But, when the monster showed up, he quickly ended the protest and ran off.
He was in the prison cafeteria when Shaggy Rogers and Scooby-Doo had to secretly deliver a Planispheric Disk piece to Fred Jones, Sr. He was then a victim of the attack of Krampus breaking in to get Mary Anne Gleardan.
- Scooby-Doo! Mystery Incorporated
Ernesto: You have no idea how expensive it is to be a grass-roots activist!
Ernesto: Yes! You must be willing to kill the enviroment to save it!
- He is based on Ernesto "Che" Guevara, a Argentine Marxist revolutionary, physician, author, intellectual, guerrilla leader, diplomat military theorist, who was a major figure of the Cuban Revolution; even sharing the same first name.