Pokemon Diamond: How does Gligar evolve?

Question

Pokemon Diamond: How does Gligar evolve?

Answer 1

you train him at night and give him a razor claw and gligar should evolve. Hope i helped.

Answer 2

gligar will evolve into Gliscor

when u:  level it up at night while it is wearing a razor fang

you can find razor fang at second floor of victory road

Answer 3

Attach the item Razor Fang to gligar and level it up at night

Answer 4

Gligar Evolves By Giving It Razor Fang At Night Time. You Can Find Razor Fang On Victory Road 2nd Floor

Answer 5

By letting it hold a razor fang and leveling it up once between 8pm and 4am.