Instructions
Start "Pokemon Diamond," "Pokemon Pearl" or "Pokemon Platinum." Buy Great Balls or Ultra Balls and head to Route 206. Walk through the long grass and wait for a Gligar to appear. Attack the Gligar until its health is in the red zone. Use the Great Balls or Ultra Balls to capture the weak Pokemon.
Insert a fourth-generation game in one Nintendo DS, and place the "Pokemon SoulSilver" cartridge in another. Go to any Pokemon Center and walk upstairs. Speak to the women behind the counters. One of them should take you to the Union Room. Trade the Gligar from the fourth-generation game to "Pokemon SoulSilver."
Buy the Razor Fang in Johto from the Battle Frontier. If you haven't reached the Battle Frontier yet, get the Razor Fang from a fourth- or fifth-generation Pokemon game. Attach the Razor Fang to your Gligar.
Wait until nighttime, which is after 6:00 p.m. in the game. Make sure the Gligar is holding the Razor Fang. Battle wild Pokemon with your Gligar, or give it a Rare Candy. Once it levels up, it should evolve into a Gliscor.