First of all, the movie skipped so many parts that made the story great in the book. GoF is arguably one of the best books and the movie skipped many of the great parts. I mean, Rita Skeeter was only seen in like two scenes. The book didn’t mention her being an animargus at all! Dobby the house elf was also missing. It was him who even helped Harry figure out the second task. There’s many more missing parts, but for the sake of time, I’d just say this movie is very rushed. Would not recommend. But the book—whoo, amazing!
