Ivan Steranko (2012 TV series)

"Don't you trust me? We're old friends."

Ivan Steranko​ is a Russian arms dealer, antique collector and a supposed old friend of Shredder, with a diamond right eye. He is the 2012 series incarnation of Rocksteady.

As Human
Steranko is a large, muscular blonde-haired (Balding) man with a thick Russian accent, Gold tooth and several scars on his face. Steranko wears a black suit with shoulder pads with gold spikes on it, a black dress shirt, a red tie, an Ushanka with a yellow star on it, and on his fists two golden knuckle dusters, with a hammer on one and a sickle on the other. His most distinguishing feature is that he seems to be missing his right eye, having replaced it with a diamond studded prosthetic.

As Mutant
He is a large humanoid mutant white rhinoceros with his knuckle dusters and shoulder pads fused onto his body. After this mutation, Rocksteady wears a tank top, brown bandoliers, and camouflage pants.

Personality
He describes himself and the Shredder as "old friends". He seems to take great pride in his collection. He is arrogant, short tempered, but is willing to be reasonable and make a deal.

History
The story of Steranko, and under what circumstances came he in contact with the Shredder as a business partner, is largely unknown. In "Enemy of My Enemy", He first appears to be close to Shredder, given an offhanded mention that they're "old friends". He is first seen talking to Shredder, albeit left unnamed, about a weapons deal. Shredder does have the cargo searched just in case Steranko pulled any tricks. During the Turtles' fight with Shredder, he is presumably knocked unconscious by the weapon that was meant to incapacitate Shredder In"The Legend of the Kuro Kabuto". Steranko, an ancient artifacts collector, is shown to have Excalibur and the Spear of Destiny in his collections where he has the ability to tell the difference between a fake artifact and a real artifact. He was revealed to have some past with master thief Anton Zeck, who at that time he was helping him with a vaguely defined job (allegedly, accidentally), is the one who shot out Steranko's right eye. Steranko hires Zeck to steal Shredder's helmet the Kuro Kabuto from Shredder to add to his collection. When Zeck meets up with Steranko in his helicopter, they discover that Leo had swapped it out with dirty diapers. Upon discovering this, Steranko vows to hurt Zeck for it.

In "A Chinatown Ghost Story", Fong said Steranko would pay through the roof for the Mystic Dagger.

In "Serpent Hunt", after the Kraang took over the city Steranko and Zeck have been stuck in Steranko's hideout for months with nothing left to eat but cockroaches and ketchup. They came up with a plan to get out of the city, they would find Shredder's daughter and trade her with him for a safe way out of the city, as the last thing they wanted was to be mutated by the Kraang like the other humans in the city. But the plan didn't work as intended, the turtles released Karai, and Steranko and Zeck were punished, by being turned into two hideous mutants.

Collection
Steranko is known as a passionate collector of legendary historical weapons. Particular highlights of his collection include:
 * Spear of Destiny
 * Excalibur
 * Armor of Alexander the Great
 * Stuffed Polar Bear
 * Stuffed White Rhinoceros

He has been trying to steadily expand his collection - even if the affected object is cursed or in the possessions of his "business partner".
 * Kuro Kabuto - Steranko hired Zeck to steal Shredder's helmet.
 * Mystic Dagger - The Purple Dragons wanted to sell him the dagger.

Quotes

 * (To Anton Zeck for failing to get the Kuro Kabuto) "I goinig to pop your head like blueberry!"- The Legend of the Kuro Kabuto
 * (Plea to Shredder) "Let us become reasonable, I'm more useful to you as normal guy, not mutant!" - Serpent Hunt

Gallery
Ivan Steranko (2012 TV series) /Gallery

Trivia

 * Steranko is left entirely unnamed in his debut episode, with the only indicator about his name being the end credits. Steranko's name was only mentioned in his second appearance.
 * Steranko has a hammer and a sickle molded on his knuckle dusters, the hammer and sickle were the symbols of the Soviet Union, and represented the union between workers and peasants.
 * Although the computer screen in Stockman's laboratory showed the silhouette of a white rhino, Rocksteady's nose is shaped as the one of a black rhino's.
 * In Serpent Hunt, it is revealed that he has a brother named Boltak.