Given the Pokémon’s annoying status move “Confuse Ray,” Zubat can be an extremely irritating creature to capture. And the truth of the matter is: It probably is not even worth the hassle.
Zubat evolves into Golbat starting at level 22, but it is not until it reaches its final evolutionary state,
Crobat, that this Pokémon becomes truly viable – and that is still debatable. Not to mention, Golbat requires an extremely high level of friendship with its respective trainer in order to evolve, so good luck with that.
All in all, Zubat is simply a pain to deal with and it does not offer near enough upside. It is far from the most useless Pokémon on this list, but it is still probably not worth your time.