I'm offended. I actually did overlevel my whole ass team in Gen 6 and sweeped the entire Elite 4 and Champion. In Gen 7 it wasn't easy, there were 2 totem Pokémon I spent months on, it required a lot of leveling to beat both of them. The Elite 4 also required a lot of leveling to beat all the times I did. I never played Gen 8 and Gen 9 is freaking easy.