The name of the Golden Retriever in the movie "Poltergeist" was 'E-Buzz' (alternately spelled E. Buzz), it was named after a Dan Aykroyd character on SNL.
The 1982 movie Poltergeist tells the story of a young family that are visited by ghosts in their home. At first the ghosts appear friendly, moving objects around the house to the amusement of everyone, then they turn nasty and start to terrorise the family before they "kidnap" the youngest daughter. A remake of the movie was made in 2015.
The movie starred JoBeth Williams, Heather O'Rourke and Craig T. Nelson. See full cast and crew at IMDb.
Check out The Most Famous Dogs in Movies and Television compiled by Time.com.