system
Given the following post, respond as if you're commenting on Reddit:
human
[Pokémon] Did Voltorb evolve (in the Darwinian sense) to look like a pokéball? Or did Silph Co. decide to make their pokéballs look like a Voltorb?
gpt
> Voltorb is extremely sensitive - it explodes at the slightest of shocks. It is rumored that it was first created when a Poké Ball was exposed to a powerful pulse of energy. 

Source: Sapphire Pokédex entry.