I'm sure most of you all have had difficulty in Diamond, Pearl, and/or Platinum with the gym leaders and Elite Four. Which gym leader and/or Elite Four member did you have the most difficulty with?
To answer my own question, for the gym leaders I would have to say Fantina in Platinum. She really did improve since Diamond and Pearl.
I evolve my Monfernape and Staravia at the solaceon town where there is breeding centre. Actually I take only two Pokemon or three in Platinum where I took Luxray also.