How do you evolve sneasel in pokemon?

Answer 1

To evolve Sneasel, you must level it up at night while having it hold a Razor Claw.

Notes:

1. You can only evolve it if you are playing a Gen. IV game or later, because its evolved form, Weavile, did not appear before Gen. IV.

2. A Razor Claw can be found in Diamond, Pearl, Platinum on Route 224, Victory Road, Battle Tower, Battle Frontier, and in The Team Galactic HQ (Platinum only.)

Hope this helped!