Maximilien de Robespierre is the (former) quaternary antagonist of Dreamworks 2014 animated film, Mr. Peabody & Sherman. He is the political revolutioner of France. He is voiced by Guillaume Aretos.
He tries to execute Mr. Peabody and Sherman because he thinks they are the aristocrats oppressing the common folks of France. He tries to guillotine Mr. Peabody, but fails. He is easily angered about being tricked by a cantaloupe while Mr. Peabody and Sherman runs in the sewers. Robespierre goes a sword fight with Mr. Peabody, and Mr. Peabody wins. Finally, Mr. Peabody and Sherman finally escaped from Robespierre.
Later on in the movie, the rip in the space-time continuum opens, which causes the people and object from the past to go right to the present. The police tells Robespierre to back away from the WABAC, but he refuses so he gets tased.