Scooby-Doo Runs for Hero Dog President (2013 short)

When Scooby-Doo is running for dog president, Shaggy aids him, and when 3 escaped convicts escaped from prison with a woman, they decide to kill the dog president.

Characters

 * Scooby-Doo (Neil Fanning)
 * Shaggy Rogers (Matthew Lillard)
 * ???, ???, ??? and ??? (Gary Oldman, Scarlett Johansson, Jon Bernthal and Jack Black) - the 4 main antagonists of the short, ??? is the leader, ??? is his lover with long red opera gloves and red strapless dress, who always charms men, ??? is the loose cannon and ??? is the knife liker
 * ??? (Marton Csokas) - the one who ask for Scooby's assistance
 * ??? (Naomi Watts) - the bride who is about to get married
 * ??? (Ariel Winter) - the girl who asked Scooby to save her cat from a tree
 * ??? (Christopher Walken) - the old man who asks Scooby for directions

Plot
???

Trivia
This shorts connects to Scooby-Doo 3: The Curse of the Halloween Wizard