Crobat
It evolves by friendship.
at level 48
Golbat does not evolve into Crobat at a specific level, it instead evolves by love. If you want it to evole, battle with it a lot and don't let it die, it will come to love you and eventually evolve.
onix evole from gedude
in platinum what leve does staravia evole
no
No, it does not.
No
No.
you evolve golbat by friendship
Golbat evolve into crobat with happiness
Trade the golbat and it will evolve.