ArchedThunder
Banned
Truthfully I did not know the biological stuff was from this far back. But this still doesnt say they can train to get stronger. Gero put parts inside them that gave them super powers. Its still a leap to think pushups would increase that power even with this.
Its not like gero put the parts in, had them train, and then they had the power. Until he said it was possible, its pretty debateable it was. And nothing in the rest of z expanded on it. And a trained up 18 would have really helped the Buu saga
Daizenshuu 4, released October 1995
Artificial Human No. 17
A cool-headed artificial human who enjoys battles as if they were games. As the twin brother of No. 18, he places more importance on power. Like No. 18, he is fundamentally human-based and only his organic matter has been restructured. The few mechanical parts that are used were for his emergency deactivation controller and self-destruction device. If the emergency deactivation controller is used on the powerful No. 17 and No. 18, they become unable to move their bodies.
There power doesn't come from mechanical parts, it's all organic, there is no reason they couldn't get stronger. 17 and 18 are just genetically modified superhumans, not actual cyborgs.