Bruno

Bruno is a large grey bear from Siberia. Though not technically a pet, he acts as a guardian towards Bridgette, attacking anyone that comes close to her, including her boyfriend, Geoff.

Total Drama World Tour
In Aftermath Aftermayhem, he is shown to apparently be attacking Bridgette (who was maliciously sent to Siberia by Blaineley) and seemingly destroys the camera. The bear is later seen crying over an injured paw and Bridgette is shown helping it with its injury. Bridgette calls the bear "Bruno" and insists on staying in Siberia until his paw is healed.

In Hawaiian Style, when Bridgette surfs back to the new studio, Bruno is following her on a surfboard. Just when Geoff and Bridgette are about to kiss, Bruno punches Geoff, showing he has become very possessive for Bridgette. After scolding the bear, Bridgette explains that Bruno has become possessive and will hurt anyone who comes within three feet of her. Even an attempt at touching Bridgette's elbow with his own causes Bruno to growl at Geoff.

After a performance of Who You Gonna Root For?, Geoff gives the microphone to Bridgette and she kisses his cheek. Unfortunately, this causes Bruno to attack Geoff and backhand him into the ocean. Bridgette scolds the bear again and he sulks over to where the Peanut Gallery is sitting, causing everyone in the front row to shift away except Beth, who is too frightened to move. Bruno sniffs Beth's hair and starts licking the back of her head. The bear is later shown wearing a napkin as a bib and licking his lips at Beth, attempting to eat her. In an effort to calm Bruno down, Harold suggests feeding him Kava tea. Once the tea is ready, Harold is the only one brave enough to give the tea kettle to Bruno, who calms down after drinking from it. Once Bruno is relaxed, Geoff and Bridgette attempt to hug each other before cutting to a commercial break, resulting in Bruno raising his paw to strike Geoff. However, the tea causes Bruno to become sleepy and he collapses on Geoff instead.

Bruno is restrained for a large part of the episode, until a heavily bandaged Blaineley crashes into the ocean during the surfing challenge. Bruno runs out and rescues her, only for Geoff to note that perhaps he considers her a chew toy. At this point, Bruno seems to lose his possessiveness, as he is indeed more interested in chewing on Blaineley's head than he is of protecting Bridgette. Geoff takes full advantage of this and finally hugs Bridgette again, glad to have her back, while Bruno continues gnawing on a terrified Blaineley's head.

In the exclusive clip of the episode, Bruno is still chewing on Blaineley's head next to several couples who are relaxing on the beach.

Total Drama All-Stars
In an exclusive clip of Evil Dread, Bruno is seen with Blaineley on a swan boat in Paris, France hugging. But while floating on the water, their boat accidentally collided into Lightning.

Trivia

 * Bruno is one of four different bears to appear in Total Drama. The others being Molotov seen in No Pain, No Game, the original bear, and the polar bear seen in Anything Yukon Do, I Can Do Better.
 * Bruno (or another similar bear) appears in I'm Gonna Make It.
 * Total Drama World Tour and Total Drama All-Stars are currently the only seasons to feature Bruno, as he did not appear in Total Drama: Revenge of the Island, or Total Drama Action and Total Drama Island.
 * Bruno is one of two named bears in the series, with the other being Molotov.