Tiberius is a supporting protagonist of the 2016 animated movie The Secret Life of Pets. He is voiced by Albert Brooks.
The Secret Life of Pets
Tiberius is kept in a shed with a mask atop an apartment building. Gidget climbs up to the roof look for Max, Tiberius calls her tells her to come to the cage. He says he'll help her find Max if she lets him, so Gidget goes inside the shed and takes off his hood. Then Tiberus tries to eat her, chases her outside, but the chain on his leg stops him. Gidget gets mad, Tiberius apologizes says he's a predator with no friends. Though Gidget doesn't fully trust him, she understands so she tells Tiberius she'll be his best friend if he helps find Max. Tiberius agrees and Gidget takes off the chain, he flies off to find Max