On Victory Road's first floor
you can not get it from Pokemon platinum you can trade in to diamond or pearl
Route 244
get a razor claw and a sneasel and level up
No wild Pokemon hold the item razor claw but you can find razor claw at Route 224, Victory Road and available to buy at the Battle Tower (D/P) -Clensen
In the low right corner of Route 24.
its gone u dont get another
you make it hold a razor claw and level up at night.
catch sneasle, and trade it holding a razor claw. No you have to give it a razor claw and level it up at night
Level your Sneasel up while it is holding a Razor Claw.
route 224........... but i think you can also get one at the fight area
Sneasel evolves by letting it hold a Razor Claw and then leveling it up at night.
You can buy a razor claw from the PokeShop, if you have enough Pokemon Coins!