Crobat is an excellent anti-metagame poke in UU-checking Scrafty, Mienshao and Heracross. If you need some more power, go with the CB set. Brave Bird is incredibly powerful-1HKOing Scrafty at +1. Crobat's main selling point is his excellent speed. Yanmega has an awful defensive typing, and is 4X weak to SR, and Honchkrow is no-where near as fast. Togekiss is a great stall-breaker, but still isn't capable of taking out Heracross or Mienshao like Crobat is. Crobat makes a great anti-lead, thanks to Taunt and U-turn.