User blog comment:Silkworm Bot/Unpopular opinion/@comment-2054732-20170509052254/@comment-2054732-20170509212945

Pesticides only wiped out the weakest of a population so stronger bugs are unaffected. Thats why the use of pesticides has created species of "super" bugs that can no longer be killed by standard pesticides. And while bugs hero motiefs are related to why its supereffective on dark types, poision was never intended to be a villian type. The only reason poision was so prevelant in Team Rocket is because during generation 1 poision was the most prevelant type, so they ended up more on teamrockets side. Giovonni himself specialized in ground types not poision and he was the big bad of gen 1. Mewtwo was depcited as the most dangerous and he is psychic, much like Sabrina the bad gym leader. Poision never had any evil connotations.