Zubat wouldn't suck quite so bad if it didn't know Supersonic. Speed disadvantage I can live with, but speed disadvantage + opponent has the first opportunity to inflict Confusion? It's pretty much guaranteed that you'll be seeing a lot of "[Your Pokemon] hurt itself in it's confusion!" because the computer is a cheating bastard when it comes to status effects. Hope you caught a Pikachu in Veridian Forest before heading through Mt Moon, because it's your best option re: speed and type advantage against these guys. Even then, it's a 50/50 chance of Ground Type or Zubat in there, so have fun switching out regardless.
Having to love your Golbat enough to evolve it to Crobat is still one of the funniest things Pokemon as a series has ever done.
Having to love your Golbat enough to evolve it to Crobat is still one of the funniest things Pokemon as a series has ever done.