Actually, Prowlered. Togekiss can beat the living daylights out of Crobat, in my opinion. I have used both Crobat and Togekiss in Pokemon Platinum and Pokemon Soul Silver.
First of all, I admit that Crobat has extremely high speed and decent attack and special attack. Crobat deserves the praise, and is one of the best special sweepers I have had in the game. BUT Togekiss has PARAFLINCH, the best moveset EVER possible for Togekiss. (Paralyze+Flinch) With Serene Grace and this moveset(Thunder Wave, Air Slash, Extrasensory, Aura Sphere), Togekiss can sweep nearly a whole team if used well. Now Crobat would NOT one K.O Togekiss with one Poison Physical(Togekiss has decent defense and HP), and after Crobat hits Togekiss, Togekiss would hit Crobat with Thunder Wave, making him PARALYZED and cutting down 75% OF HIS SPEED, basically defeating the WHOLE PURPOSE of having a Crobat. Then use Air Slash again and again, having a 60% FLINCH RATE with Serene Grace. Basically, Togekiss now always goes first and with the paralysis and flinch, Crobat can't even move. Against a Paraflincher, Crobat is a pile of trash.