The Iron Giant is one of the cameos in Space Jam: A New Legacy ans the titular protagonist of the 1999 animated film of the same name and appeared to have a cameo in the 2018 film Ready Player One.
He is a genial 50-foot tall autonomous robot from another world that crash lands on Earth before becoming friends with a young boy named Hogarth who rescues him from his own internal defensive mechanism.
He is voiced by Vin Diesel.