The Iron Giant

The Iron Giant (known as カウボーイ in Japan) is a massive, absolute unit composed of 50% adamantium, 30% vibranium, 20% steel, 100% hatred of capitalism, and 0% tolerance for Ukrainians.

Creation
In a flashback seen in chapter 183, Tim Burton created the Iron Giant in his underground lab in the Soviet Union from 1924 to 1927. However, in 1927, Joseph Joestar (under the persona of Hoeseph Hoestar) infiltrated and assassinated Tim Burton, leaving hte Giant inert.

Awakening
During the events of the Pillar Men Arc, the 5th Pillar Man, Ricardo Milos, traveled to the ruins of the Soviet Lab in chapter 183 where he flexed so hard that his veins burst. The blood that burst from his bulging biceps splattered onto the Giant, granting him life. The Giant stood up, but recognized that Ricardo was not a communist, and in fact was a moderate socialist. The Giant knocked Ricardo unconscious with one punch, but spared him from death. The Giant headed out for America to wreak havoc.

The Iron Giant's American Vacation
In chapter 187, William Howard Taft caught wind of the Giant's appraoch. He and Hoeseph Hoestar flew out in their stolen biplane to stop the Giant (Taft had to be carried beneath the plane in a net). When they arrived in Newfoundland, the Giant was 20 miles off the coast. They flew off to fight him, and an epic battle ensued. The Giant was able to resist Taft's Thunder Clap, but was ultimately defeated by a Seismic Slam from Taft powered by a bottle of coke from Hoeseph. The Giant was plunged into the Earth's core due to the addition of the Coke bottle. The Giant was never seem from again until chapter 347.