Vinny Larsson is a dog purchased by the Griffins at Quahog Pets as a replacement for Brian in "Life of Brian" following Brian's death. He is currently the pet, best friend, and loyal companion of Tord Larsson. In “Simpsons Guy 3: Disney Edd-venture”, it is revealed that him and Tord were responsible for the attempted murder of Brian. Tord adopted Vinny as a puppy after finding him on the road as he ran away from his owner due to his unfair rules. This was revealed in "Road to the Omniverse".
Like Tord and his family, Vinny is shown to be evil. He would always accompany Tord in his shenanigans. An example of this would be that he tried to run over Brian with Tord. If they succeeded, he would pretend to be the new Brian until he gained the Griffins’ trust, and once he did, he would murder the remaining Griffins with help from the Larssons. Despite his evil antics, he genuinely cares about Olivia. Ever since he joined the band “Red Shirt, Blue Shirt”, he would often go with Olivia to perform. Olivia’s mother, Daisy, does not approve of this, so she frequently assaults Vinny whenever he went near her daughter.
Vinny was purchased by the Griffins at Quahog Pets as a replacement for Brian in “Life of Brian” after he was killed by a car. There, they find Vinny, a "pussy hound" who claims to be 1/16th cat. He wins over Peter by being able to talk and suggests that if he is sent to fetch a stick, he could bring back an iPhone that "fell off a truck" instead. Feeling guilty that he was unable to save Brian since destroying his time machine, Stewie at first refuses to accept the new dog until he discovers that Vinny had just lost his previous owner around the same time and thought he and the Griffins needed each other and comes to accept Vinny. As of "In Harmony's Way", he replaced Brian in the "Theme Song". In "Christmas Guy", Vinny helped Stewie distract his past self so he could steal the return pad from his backpack and travel back in time to save Brian. As a result, the family never got Vinny from the pet store and he and the Griffins never met. At some point, Vinny is adopted by Tord and his family. In Simpsons Guy 3: Disney Edd-venture, Him, along with Tord and his family go to Disney World and try to kill Mickey Mouse after the death of Debbie Stone. They also try to kill Edd and his friends, The Simpsons, and The Griffins, only to be taken away by the police. Near the end, they damage the plane, which the gang were gonna use to get home, they are eventually arrested again. In School Daze: The Movie, they break out of prison and try to kill Caillou, but they are stopped by him and his friends and get arrested by Joe, they escape at the end. In Simpsons Guy 4, The Pokemon Daze, they get Team Rocket to kidnap Pikachu and Stewie. Vinny has a cameo role in "The Boys in the Band". After Olivia Fuller steals Brian and Stewie's musical group Red Shirt, Blue Shirt, She replaces Brian with Vinny so she has a singing dog as well. In Uncle Funtime: Thanksgiving Edition, Him, Tord, and Team Rocket trick a little boy into kidnapping Pikachu and trying to kill Ash and the gang. In Regular Show, they try to help Anti-Pops destroy the universe. They are disappointed when Pops and Anti-Pops die in School Daze 2: A Jolly Good Battle. In Larsson and the Power of One!, him and his family give potions to Lois and Daisy, causing them to be allergic to dogs and straw. They also blinded Carter, thus forcing Brian to take care of him. However, both of those plans fail, so they decide to give candy to Stewie, which contains the demon, Fred Blackout. Meanwhile, the potions caused Lois to lose an arm, Daisy to turn into a cat, and Boots to become 50 feet tall because he drank the potion as well. Then, Olivia ends up eating the candy and gets possessed by Fred Blackout. After killing Stewie, Vinny and his family promise to take it easy with their evil schemes. In the Paradise series, Him, along with Tord and Olivia followed Tom and the gang around and tried to ruin their summer. He helped the Larssons raid New York City in "Uncle Funtime 4", tried to get Brian to join the dark side in "Animas Extravaganza", participated in Eon's Zombie Apocalypse in "Road to the Omnivrse", and is currently working with Bill Cipher to start another Weirdmaggeddon in the "Rise of Bill Arc".
Vinny is a pussy hound with tan fur on his head, back, arms. and legs, and light yellow fur on his belly. He also has black eyebrows, an italian accent, a pointy snout with a small black nose, a small tail, and a chubby belly. He always wears a black collar with a gold tag.