Peacekeeper

The Peacekeeper is a military android powered by the mysterious "Red Core" energy orb. It was commissioned by President Stone, and built by the Metro City Ministry of Science under Dr. Tenma's direction. Peacekeeper is an extremely powerful experimental robot, containing "Adaptive Technology" that lets it absorb other objects. However, it is highly unpredictable, and its malfunctioning power kills Toby Tenma. Peacekeeper appears in the 2009 Astro Boy film.

Abilities
Peacekeeper is primitive in AI but extremely advanced in weaponry. It was engineered to defend Metro City, but it was also part of President Stone's ploy to impress Metro City's populace. Peacekeeper is equipped with several powers:


 * Adaptive system - Peacekeeper is able to absorb both inorganic and organic substances. Absorbed metals add to Peacekeeper's body mass, and absorbed batteries and energy sources add to its power supply.
 * Arm cannon - Peacekeeper's right arm houses a dense plasma cannon. This cannon can be fired by holding its arm out straight and redirecting energy into the cannon.
 * Energy core power - Peacekeeper was specifically designed to run on one of the newly-discovered energy cores. Its power supply is kept in the centre of its chest, and this centre glows to indicate Peacekeeper is powered on.
 * Merging - While not an intended feature, Peacekeeper can absorb human beings and other organic life forms. It merges with President Stone after Stone gets too close, but Stone assumes control of Peacekeeper's body.

Appearance
Peacekeeper is a large, bulky bipedal droid. It stands at approximately 3 meters (10 feet) tall and has a top-heavy build, with an enormous upper body and wild shoulders. Meanwhile, Peacekeeper's head is small and cylindrical; its face is plain, with a long chin and LED panel eyes. Most of its body is built with grey and blue silver metal, while its limbs are made of bulky dark grey metal.

Story
At the beginning of the film, Peacekeeper is being completed at the Ministry of Science. President Stone and his bodyguards meet with Dr. Tenma to discuss the Peacekeeper's progress. Stone approves of the Peacekeeper, but rejects Dr. Elefun's suggestion that it run on the Blue Core's positive energy. Instead, Stone chooses the Red Core, albeit for ridiculous reasons; he describes how "women voters are partial to the color red" and how he wants "a fighter, not a lover".

Against the Ministry's scientists' objections, the Red Core is placed into the Peacekeeper. The Peacekeeper immediately begins to rampage until it is trapped in a force field. It takes no notice of the fact that Toby Tenma is also trapped in the force field, and Peacekeeper instinctively fires its arm cannon at the field. The ensuing blast knocks out Peacekeeper but incinerates Toby. Peacekeeper is set aside for repairs while Dr. Tenma builds a robot version of his late son.

Peacekeeper remains dormant until President Stone reactivates it, hoping to use it to apprehend Astro. Peacekeeper still contains the Red Core, and it still refuses to take orders. Stone attempts to force the robot to listen to him, but it absorbs him instead. Stone and Peacekeeper merge into one entity with Stone taking control of its body. The megalomaniacal "Stonekeeper" begins to absorb the Ministry equipment around him, before bursting out of the building and terrorizing a political press conference.

Stonekeeper rampages through Metro City. He searches for Astro so they can fight, and attempts to leave to go down to the surface world. Astro tries to battle Stonekeeper, but the only thing that can stop Peacekeeper for good is to bring the Blue Core near his Red Core. Astro is willing to give his life to save the inhabitants of Metro City, so he flies directly into Stonekeeper, and overloads its systems with the Blue Core. Astro and President Stone both survived the ordeal, with the latter being arrested for the destruction he had caused, much to his fury.

Video game
In the video game adaptation of the film, Peacekeeper appears as a reoccurring boss throughout the game. He is the boss of World 4, a slightly larger mini-boss in World 5, and the game's final boss in his mechanical monster form.