>>50512372Alright, let's break this down.
First off, yes, the games are clearly designed around you using 6 Pokemon. That's why you get 6 party slots, not 30, not 1.
Secondly, you're encouraged to do so due to type disadvantages that might arise as you get through the game. Overleveling works early on but it's doubtful it'll work on the Elite 4 and Champion without some serious grinding as the exp requirements to overlevel by a significant amount catch up with you.
Thirdly, you literally ignored the bulk of my argument and focused only on the first line because it completely destroys your entire narrative, good job.