No, Happy Feet is not real, because it is a computer-animated movie. It depends on your definition of real, a computer-animated movie is a real computer-animated movie. But to answer the question of whether Happy Feet was real photos of penguins, the answer is no. Happy Feet was a movie whose video was produced by computers.
Happy Feet is just an animated movie. It is not based off a true story or anything. It is just an animated movie made by disney pixar or whatever to entertain children. Animation can make movies about anything, it just depends on what company is making the movie and who is directing and producing it.