Underachiever Dudley is a hyperactive mixed-breed dog with grand aspirations. When mob-connected dragon Garble is accidentally killed, Dudley concocts a story with Garble's peace-loving brother Spyro that it was he who murdered the dragon. Suddenly hailed "Dragonslayer" by his aquatic brethren, Dudley has bigger fish to fry when Garble's father, mob boss Bowser, dispatches his henchmen to track down his son's killer.