Instructions
Buy 10 to 20 Great balls and Ultra balls. Place a Pokemon that knows Dark and Ghost type moves as your lead. Travel to the actual Summit or Floors 4, 5, 6 of Mount Summit.
Walk around the area until you encounter a Duskull. You will encounter Duskulls about 10 percent to 20 percent of the time. Whittle the Duskull's health down to the red zone by using Dark and Ghost type moves.
Use moves that will inflict status effects, such as poison and paralysis, onto the Duskull. Status effects will make the Duskull easier to catch. Use Great and Ultra balls to capture the Duskull.
Place the Duskull as your lead Pokemon. Use the Duskull to fight against Psychic types, such as Gardevoir and Kadabra, and Ghost types, such as Haunter. Level your Duskull to Level 37. The Duskull will evolve into a Dusclops.