Cobalt

Cobalt (a.k.a. jetto) was the dum brother of Astro Boy, he apprers in both the 1960's and in the manga series. he is a rather rough copy of Astro to defuse a H-bomb that was accidentally dropped to the bottom of a sea. Cobalt had every Secret power and had exactly same IQ that Astro has,the IQ is 0 but Cobalt was not as patient as Astro, so he was not capable of defusing any mechanical devices.