Please stop making random threads for tiny questions. In the forum your posting in there just so happens to be a stickied thread about discussion of FR/LG, for these types of questions.
But to make my post somewhat contributional, it Golbat evovles by friendship.
Happiness! It sounds like a curse to most people, but Happiness is not that hard to acquire. With practice [ take it from an expert on Happiness ], you will be able to get max Happiness on your Poke`mon in minutes!