How do you get the scythe scope in Pokemon planet?

In Pokémon Planet, the Scythe Scope is obtained by completing a specific quest. Players need to find and defeat the boss called the "Grim Reaper" in the Haunted Tower, which is located in the Kanto region. After defeating the Grim Reaper, you can receive the Scythe Scope as a reward, allowing you to encounter certain ghost-type Pokémon. Be sure to check any specific requirements or conditions for the quest to ensure you can access it.