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 Tobio 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 has several special attributes:


 * 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. It can even convert enemy bots to its own allegiance.
 * Arm cannon - Peacekeeper houses energy cannons in both of its arms to weaponize its provided energy.
 * Energy core power - Although the Peacekeeper has an integrated power source by default, it was specifically designed to run on one of the newly-discovered energy cores, stored in its chest with unlimited potential.
 * Merging - While not an intended feature, Peacekeeper can absorb human beings and other organic life forms. It is able to absorb Stone, who would then assume control of its chassis.

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 destroys hordes of drones launched at it, converting some to its allegiance with its absorption tech. After that, it turns hostile and begins to attack. Dr. Tenma stops it with a barrier, but inadvertedly traps Tobio. Peacekeeper, who doesn't notice him, attempts to destroy the barrier with an energy blast, but ends up disintegrating Tobio. With the barrier still standing, it uses its asimilation properties to disintegrate the obstacle until Elefun manages to wire the blue core's energy inside with brute force and disables it, blasting all the drones out.

Peacekeeper remains dormant until President Stone reactivates it, hoping to use it to apprehend Astro. When Stone tries to reiterate his order, the Peacekeeber's body drags Stone inside it, and Stone assumes control of the bot. The megalomaniacal "Stonekeeper" begins to absorb the Ministry equipment around him, before bursting out of the building and terrorizing a political press conference. It even manages to assimilate the Spirit of Freedom battleship on its left arm as its weapon, as well as various structures in Metro City for armor, rendering it near-invulnerable to brute force.

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 knowing its only weakness, its power core, requires his own destruction, he sacrifices himself, destroying the Peacekeeper. President Stone survives, and was arrested for his crimes.

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.