The film, overall, cost about $24 million, and the mechanical ape, which weighed 3.5 tons and was filled with 4,500 feet of wiring, cost $1.7 million to make. That is one-twelfth of the entire budget dedicated to "Fuck it. We're doing this." That's like if George Lucas had spent half the budget of Star Wars hoping that his set designers would complete a full-size, fully operational Death Star in time for the film's release. It seems like a fool's gamble to even consider thinking of something like that, but if you've ever seen this King Kong, which takes the original Kong's excitement away and replaces it with the dad from Beethoven telling Jessica Lange that Kong wanted to rape her, you won't be able to even consider logic when it comes to this movie.
The mechanical Kong comes into play in the third act as he's about to be showcased to a crowd. After the weird, artsy touch of having Kong arrive covered in what looks like a giant gas pump, he does the usual "get fucking pissed" routine and starts to break loose. During the film's most kinetic scene, the filmmakers thought that it would be the perfect time to bust out the most non-kinetic thing related to the movie. You see, earlier in the film, Kong was a man in a suit, and a human being has the ability to move like he's not filled with 4,500 feet of cable. If Rick Baker had suddenly been pumped full of tons of cords, I could see why it looked so terrible and would start wondering why King Kong wasn't dedicated to the memory of Rick Baker. But it isn't. It's just something that works like the universe was delivering karmic debt that day and had knocked on the door labeled "Impossible Dreams."
Sometimes the answer isn't "build the largest robot you possibly can." That might be the most depressing sentence I've ever typed.
It's only used for a few seconds, and you'll notice its insertion when the film suddenly shifts from an angry, walking Kong to a weird action-figure-looking Kong with a blank stare on its face. At 40 feet tall, it is the largest mechanical creature ever designed for a movie, and by far the one that sucks the most. Take that, Guinness Book.