Bring as many Poké Balls as you can. If you’re looking for an ideal Ghost-type sweeper, this is the best place to go.
Always crouch while walking around Wild Zone 4. There are a lot of grass patches here, which you can use to sneak around and hide from Pokémon that you don’t want to catch.
To obtain a 100% survey on Wild Zone 4, you need to visit the area both in daytime and nighttime, as you can only catch Patrat and Honedge at night.
Other than Gastly, which you can evolve into Haunter and then Gengar, another competitive Pokémon that you can catch here is Honedge, which can turn into its final form, Aegislash, a Steel/Ghost type that can change into two forms in battle.
