>>54475571it's a legitimate concern. everything in johto is piss weak.
you'll sometimes hear people say that the game forces you to grind, which sounds contradictory, but it's a symptom of the same problem. because everything is so weak, you get less exp. from playing the game normally, meaning it's a pain to train new mons. it's not so bad in GSC, but HGSS makes it worse by removing badge boosts.
tl;dr a johto playthrough boils down to either sweeping everything with one or two mons, or struggling to keep up with the levels using a larger team, with no inbetween.