Bora

Bora is a Robot from the 2nd part of "The greatest robot on earth" and has 2-million horsepower. He and Pluto were both made by the same person, and he possessed the power to cause damage by screaming his own name. after he fights Pluto, he is destroyed by Astro boy from the inside. he was originally a rotund-ish giant robot, but in the 1980s anime, he is re-imagined as a horrible monstrosity of a robot with 2 bird-heads, clawed feet, long arms, a tail and no torso.

Bora is the one who killed Pluto.

Trivia

 * Bora's role is filled in the Astro Boy 2003 anime by Acheron.