One of Sunshine&#039;s star pupils, Rex King is from the United States. His right arm is actually a Tyrannosaurus head and neck, known as the Jurassic Hand (ジュラシックハンド). In truth, he is actually a dinosaur and his &quot;Jurassic Hand&quot; is his real head and what appears to be his &quot;head&quot; is a fake and it only stores his brain. After fighting Terry for a while, he was put into a strangle hold that started fossilizing his Dinosaur hand. He pummeled Terry the Kid with his brutal attacks, but Mantaro helped out Terry by telling chillingly bad jokes (coldness being a dinosaur&#039;s weakness) and ended up having his head crushed to bits by Terry&#039;s finishing move. He bears a resemblance to Beast Wars&#039; Megatron.    wikipedia

Kid Muscle (or Mantaro for short) is a bumbling, gross, and wimpy sort-of person. Unfortunately, he has been summoned to protect the earth from the evil dMp, a band of cheating wrestlers from outer space. Luckily he's not undertaking this task alone. Kid Muscle must join the Muscle League, a group of wrestlers from outer space who are training themselves so they can defend the earth, and stop the dMp by achieving "Ultimate Muscle", a hidden power that makes Mantaro an almost unbeatable opponent.
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(Source: Anime News Network)

Marc Thompson is an American voice actor who has worked for 4Kids Entertainment, NYAV Post and DuArt Film and Video. Some of his major roles include Kevin Thompson, Anthony DeMartino, Timothy O'Neill in Daria. He is notable for voicing the titular character in Robocar Poli. He voices Casey Jones in the 2003 version of the Teenage Mutant Ninja Turtles cartoons and video games. He is the narrator of numerous Star Wars audio books including The Thrawn Trilogy, Hand of Thrawn, Legacy of the Force and Fate of the Jedi series. He earned his BFA from New York University's Tisch School of the Arts in 1997. He is a Christian and a father of two.

(Source: Wikipedia)

Kid Muscle, the son of legendary wrestler King Muscle, rockets to Earth and finds an evil wrestling gang called the DMP tearing the place apart. The punks on the DMP are the weirdest, nastiest, most outlandishly powerful musclebound freaks the galaxy has ever known. Kid Muscle's only hope: form a team that's even wilder. The only possible result is earthshaking, bodyslamming, ultimate-powered action that sends our entire planet sailing over the top rope!
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(Source: Viz Media)