The piece on his head and some colors are different. All the rest is 100% official build. Because it's creator "John Brodeur" uploaded some pictures on B-Shelf. However now you see him from some different angles. And have a size comparision with Nektann and a Tohunga. I believe this is the largest Bionicle Character that has a set model.
It also not a model to play with like other sets, since it can barely stand on his own without falling. Took me four days to build it.
Instructions of his creator