I'm tired of all these type specialist, especially the ones without any gimmick to back it up, a good trainer know that it shouldn't specialize too much in one type and will try to diversify as much as possible its team. (I'm pretty sure a NPC say the same in every fucking game)

When will they end this casual bullshit?
And whatever how the "league system" is in the world of Pokemon for testing trainers, it's only understandable early during their adventure with the first bosses because the trainer start to grow.