Level 14
Crobat does not evolve.
Starly evolves into Staravia at Level 15.
It evolves at Level 15
It evolves at level 14
Starly evolves at level 14 into Staravia, which then evolves into Staraptor at level 34.
it evolves at 17
Starly's third evolution is Staraptor and once Starly is a Staravia which it will start to evolve into starting at Level 14, it will then start to evolve into Staraptor at Level 34.
Pokemon Pearl/Diamond Starly evolves into Starvia at level 13 and then evolves into Staraptor at level 34. Source(s): Experience from Pokemon Diamond
Starly doesn't need a stone to evolve. It can simply evolve at level 14. Once it is a Staravia, then you would need to level it up to 34 to make it evolve to Staraptor. (A good Pokemon in my opinion.)
Once it reaches level 14, Starly will evolve into Staravia. At level 34, Staravia will then evolve into Staraptor.
starly evolves into staravia at level 14
Starly evolves into Staravia when it's a level 14.Starly evolves at level 14!