depends on your level. If your like a high level then my advice would be like caputring like typhlosion, swampert, blazekin, meganium and all the other final evo's of the starters. but if ur an iffish level then try the cave that gets u to wintown. if ur a lowlevel then try Lila forest it has a wide range of pokemon for capture, like linoone which if u keep circling him till u max out his ex. it's 100 so just look around!
~Shandra Reid Self-proclaimed Ranger expert! <3