Alpha

Alpha is the secondary antagonist in Up.

Up
Alpha is a Doberman Pinscher owned by Charles Muntz. He is the leader of the dog pack and is usually found with his second and third in command, Beta and Gamma. Like Dug, he has a collar that allows him to talk, but a malfunction makes him sound as if he'd been inhaling helium. The real voice for Alpha's translator chip is a intimidating deep voice. Russell says he likes the high-pitched voice better than the intimidating one.

Alpha has a very condescending and proud disposition, and looks down on all the other dogs in the pack. It should be noted that Alpha is the character's rank in the pack, rather than his name, as Dug became the new Alpha leader after defeating him by trapping the Doberman in the "Cone of Shame," an Elizabethan collar, causing his collar to loosen the wire again, and making Alpha's synthesized voice high-pitched again. This made other dogs ridicule Alpha and bestow the "Alpha" title upon Dug. Following his defeat, he presumably becomes one of Carl Fredricksen's pets, as he is seen at Russell's promotion ceremony in the film's closing scenes, still wearing the "Cone of Shame."

In the background, he can be seen panting with happiness once Muntz says "treat" to Carl and Russell.

Dug's Special Mission
Alpha, Beta and Gamma are chasing Kevin when Dug accidentally trips them, causing them to lose the bird. Alpha tells Dug to "watch the bird's favorite rock and tell them if it moves." Dug accidentally knocks the large rock over, almost squashing Alpha and the rest of the pack. Alpha then tells him to sit in the hole and, while giving a speech to his packmates, gets buried by Dug, who sank through the hole. Alpha is shown getting beat up several more times until he called "master" to tell him that Dug caused them to lose the bird, and that he is a bad dog.

Trivia

 * The howling wolf in Day & Night is actually a modified version Alpha-WolfinDay&Night.jpg Alpha, similar to how background humans in Pixar films are created from a "Universal Man" as a base.
 * Alpha is the seventh Pixar villain to be physically fought.
 * It should be noted that Alpha is the character's rank in the pack, rather than his name, as Dug became the new Alpha after defeating him.
 * Alpha is one of the three types of radiation in real life, along with Gamma and Beta.