Butkus was a brindle colored Bullmastiff.
Butkus's role in Rocky (1976) and Rocky II Edit
He lived inside a cage, he was up for sale at J&M Tropical Fish. Rocky is shown to really love Butkus and really would love to have him. As he would usually say "hi" to Butkus and make animal noises with Butkus. Butkus was later a Christmas gift from Adrian to Rocky to keep him company while he trained for the Heavyweight Championship of the World. Rocky and Butkus are then seen running down the street to the meat plant where Paulie works. Rocky notices a news truck outside the plant. Rocky being curious leaves Butkus outside to wait while he goes inside to inspect. After that Butkus is not seen for the rest of the flim.
In Rocky II, Butkus is seen once again still being Rocky's pet. He is first seen in Rocky's old apartment along with Adrian just after they got married. Rocky tells Butkus to move as him and Adrian wanted to lay down after a long walk downtown. He is seen often another in other parts with Rocky giving Butkus a bath and him petting Butkus. Rocky talks to Adrian about Butkus in one scene about Butkus being different and not looking like your average dog like there's something special about Butkus. After that Butkus is once again not seen for the rest of the flim or any more of the sequels.
In Rocky III and the rest of the sequels, Butkus for some reason is never seen again or mentioned. It could be possible the Stallone did not want to deal with the dog actor no longer or the dog actor got too sick to act or possibly passed away.
In Rocky Balboa, the final installment Butkus is still not seen but a dog that replaces Butkus is adopted by Rocky and Steps. The dog's name is Punchy he is seen running with Rocky to keep him company much like Butkus did. Punchy like Butkus is not mentioned or seen for the rest of the movie after Rocky's training with him.