>>58658757Being underleveled for the boss makes it a reasonable challenge, but that's not what actually happens. What actually happens is your new Pokemon you use rapidly levels up to about the level of your opponents because of the way the EXP scaling works.
>>58658825There's also the Lucky Egg halfway through the game. But if you don't want to grind, play better. The game gives you a ton of tools like the new infinite use TMs or buff items depending on your tastes, use them. Retards like Yawnfag can overlevel, the rest of us can play intelligently, that's the benefit of the level system in this case.