The Green Onion Duck already has the courage attribute when it is born or the Green Onion Duck learns the Flying Feather Slashing skill. The courage characteristic of the Green Onion Duck was introduced in the fourth generation Pokémon game. In order for the Green Onion Duck to have the courage characteristic, it needs to meet the following requirements: Pokémon with special characteristics are placed in the incubator; by using the "Moon Stone", the Green Onion Duck can learn the "Flying Feather Slash" skill. After the Green Onion Duck learns the "Flying Feather Slash" skill, it will obtain the "Courage trait". one.