I know this is a Bulbapedia article but I thought it would be an interesting discussion topic.
Obviously, traditional weapons do exist in the anime but we really have no idea to what extent they are used. One would assume that Pokémon supplanted firearms but to what extent? One would also assume that there are some people who choose a firearm over Pokémon for protection (and vice-versa) and soldiers/police officers/security guards/criminals may use both.
And regarding the episode where Ash fucks up a training exercise by attacking the "thief" with his Pikachu; I believe he earns a lecture from an Officer Jenny that warns him about attacking an armed opponent. I assume that firearms do pose a threat to some Pokémon (mostly the smaller Pokémon who are not Rock, Ground, Steel or Ghost types). But some of the attacks that Pokémon use are as deadly if deadlier than getting shot.
There is also the question: can Pokémon die a violent death or they cannot die from violence but can die of any other means?
Admittedly it is a somewhat random topic but after writing my own fan fic, watching a few of the early Kanto era episodes and reading some other fan fics, I just got to thinking.