umm... I just had to say this, Im sorry but grass and dark types arent very good pokemon 2 me. They dont have very good attacks, only good attack grass pkmn have is solar beam, darks is crunch. Except final attack with the roots, the one you get in fr/lg with as your starter from that lady in that one island,which is fine but theres no others.Please give me your opinions.

solarbeam is not good until Sunnu day, Frenzy plant is horrible. Better alternatives are Leafblade, Hp Grass and sometimes Razor leaf. You can switch out if you Leaf blade, but with Frenzy plant you give your opponent free switch/Stat-up. Leaf storm is also an option. With Dark you are right. Crunch is the only useable in advanced generation.