Coola is Freiza's brother. He is the villain in DBZ Movie 5 and 6. Movie 5 actually takes place in anime time-line, however,6 doesn't. Coola has the unique ability to transform to increase his power beyond that of his brother's and thus transform into a fifth form. He's pretty cool as a villain, and shares Freiza's polite mannerisms. In the first few minutes of the movie, it's very clear that he doesn't care about his brother very much, and just stays out of his way because with him. (A mistake that eventually ends up costing him his life). In Movie 5, Goku blast him and his death ball into the sun with a Kamehameha.