You can’t transfer Generation II Pokémon to later Generations. To transfer your Generation III Pokémon to Generation IV, you’ll need to beat the Generation IV game and then transfer the Generation III Pokémon over using Pal Park.
Route 224 - Surf off of the southern beach along the middle of the route and head south. Follow the rocks down and you’ll come across a small patch of land. You’ll be able to find the Razor Claw here. Victory Road - You can find the Razor Claw in the large cave south of the Pokémon League. you’ll need the Rock Climb ability to reach it. Battle Tower - You’ll need to earn 48 BP in the Battle Tower/Frontier in order to get the Razor Fang. You won’t be able to access the Battle Tower/Frontier until you have entered the Hall of Fame. Team Galactic HQ (Platinum only) - Enter the Team Galactic HQ and walk towards the front desk. Head to the room on the right and walk onto the second “column” of flooring. Face down and start searching the floor. You should be able to find the Razor Claw hidden on the ground.
Route 13 - Find the Treasure Hunter near the shack where the old man teaches you Ultimate Moves. Once a day, the Treasure Hunter will give you a random item. One of the items he can give you is the Razor Claw. Battle Subway - You can get the Razor Claw for 48 BP. The Battle Subway is available in Nimbasa after you have completed the main story.
Giant Chasm - You can find a Razor Claw in the Crater Forest section of the giant Chasm, right after you exit the Cave. Battle Subway - Like Black and White, you can earn a Razor Claw from the Battle Subway. You’ll only need 8 BP to get it this time. Pokémon World Tournament - This facility can be found to the south of Driftveil City, and is a place where elite trainers gather to battle for glory and BP. You’ll need 8 BP to get a Razor Claw, which means you’ll have to win eight lower-level tournaments.
Battle Maison - The Battle Maison is similar to the Battle Tower or Battle Subway form previous games. It can be found in Kiloude City after beating the game. You’ll need to earn 48 BP in order to get the Razor Claw. PokeMileage Club - You’ll need to play the Balloon Popping game (Level 3). The Razor Claw is one of the prizes available for winning Level 3.
Battle Resort - The Battle Resort becomes available after you have beaten the game and completed the Delta Episode. You’ll receive an S. S. ticket, which allows you to take the S. S. Tidal to the Battle Resort. There is a Battle Maison that allows you to get a Razor Claw for 48 BP. Mirage Forest - The Razor Claw can also be found in one of the Mirage Forests. these can appear daily, though there may be a Mirage Island, Cave, or Mountain instead. You will need to Soar with Latias or Latios to reach it. The only Mirage Forest which contains a Razor Claw is the one that appears north of Route 111. The Razor Claw will be randomly hidden in the northwestern patch of tall grass.
