Please, just stop. Crobat is one of the best Flying type Pokemon ever, not to mention it can keep up with Deoxys's Speed Form with a good Nature. Crobat DOES NOT need to be a HM slave. He is a powerhouse, with extremely high attack and speed. Crobat is not one to be messed with, and a simple Poison Physical attack will take a Togekiss out of the sky with no problem. Case closed, for now.