Instructions
Find
Travel south on Route 31 to Violet City.
Travel west through Violet City to Route 36.
Maneuver through the trees and continue on the dirt path headed west.
Travel through two gate houses and continue into the National Park.
Head northwest through the crooked path.
Enter the field through the small opening between the boy and the lamp post.
Use rock climb when you reach the plateau located east of the lamp post.
Use headbutt on the last tree on the left. The Cherubi will appear and attack you.
Capture
Attack Cherubi with a Pokemon between Levels 25 and 50. You do not want to cause it to faint. One hit should bring it down or close to critical.
Defend against the Cherubi attack.
Throw a Pokeball to capture Cherubi.