Crobat is a Poison and Flying type pokemon.
Crobat is #169 in the national pokedex, and it is a Poison-Flying type Pokemon.
Crobat does not evolve.
Crobat does not evolve into anything.
Crobat doesn't evolve.
Me
Crobat doesn't evolve sorry!!
The Weakness Of Crobat's Are Rock, Psychic, Electric and Ice.
with happeness
crobat
Koga uses primarily Poison-type Pokemon. Psychic Pokemon would be the best bet. Ground-type Pokemon would also work, but will not be as effective against his Venomoth or Crobat.
Crobat G
Some of his Pokemon include: Honchcrow, Crobat, Gyrados, and a few others. so what i suggest is use an Electric type you can take out Gyrados Crobat and Honchcrow easily he also has a weavle so use a fire type agaisnt tht and after that the rest of your team is up to you