Picador Porky is a 1937 Looney Tunes cartoon directed by Tex Avery, and starring Porky Pig. This is the very first cartoon to feature the voice of Mel Blanc. He performs the voices of Porky's friends when they get drunk and several incidental characters.
Porky and his two friends find themselves in a Mexican town. It just so happens that this the same day as the annual bull fight. They are told that the winner will get $1,000. They decide that Porky will be a bullfighter and his two friends will be the bulls. When Porky enters the ring he doesn't fight his friends, but a real bull.
Porky would bullfight again three years later in his future cartoon The Timid Toreador.