Tinkles is pet of Dennis.
Tinkles is a giant rottweiler-like puppy dog with black fur, wide eyes with big pupils and wears a red collar.
Tinkles jumps a lot when he's excited. He's easily obedient when bribed by meat.
Dennis wanted to get a puppy, but his parents, Mavis and Johnny, refuse as they explain that handling a puppy is a big responsibility. Dennis turns into a bat and leaves the room, feeling upset. When Dracula comes to check on his grandson, Dennis insisted that Dracula gets a puppy for him. Dracula was about to refuse, but Dennis, still as a bat, looks up at Dracula with sad eyes, making Dracula feel guilty.
Later, Dracula comes into Mavis and Johnny's room and something behind him bursts the door and Dracula with extreme force, which happens to be a giant puppy dog, which Dennis named Tinkles after he urinates in Mavis' living room.
At night, when Dracula was seen sleeping, Mavis asks him to watch Tinkles while she takes Dennis to school. Sluggishly, he agrees and after Mavis and Dennis leaves, Tinkles kept interrupting Dracula's sleep by pounding on his coffin. Then, Dracula immediately prevents Tinkles from peeing in his room and takes him outside to tinkle. When he's finished, Tinkles gets hungry, and a frustrated Dracula brings back a wheelbarrow filled with meat. Luckily, Dracula manages to train Tinkles better just by bribing him with a steak. This works well until Drac tells him to speak, to which he responds with "Hi. How are you?" confusing Drac.
At the hotel lobby, as Dracula worked as the receptionist, he allows Tinkles stay with him at the desk, just as long as he behaves. A witch comes to Dracula, informs him about a skeleton family that wants to check in. Dracula becomes panicked as Tinkles starts to chase after the skeletons, causing destruction around the lobby.
Tinkles is last seen still chewing on the bones of the remains of the skeletons, and Dracula says to the audience that he needs a vacation, ending the mini-short.
Hotel Transylvania 3: Summer Vacation
- He can mimic human's speech perfectly.