Catching high level CP Pokemon

As I'm sure many of you are aware, when you see a high level Pokemon with a decent CP it's very difficult to catch, you can waste lots of Poke balls on them and still not catch them.

The key here is to feed them with a Razz Berry from your backpack then use a Poke Ball.

Don't use your normal Poke Balls, use one of your special Poke Balls this gives you more chance of catching that difficult Pokemon.

Use either Great balls or Ultra balls.  You need to be level 12 in order to get the higher level balls though.  So level up your character as well.