English name: Lucas

Japanese pen name: コキ

Roman Pinyin: kki (also known as Kouki)

Gender: male

Identity (depending on the player's choice): protagonist &; The protagonist's opponent (Professor Rowan's assistant's son).

Origin: Shuang Ye Town (protagonist) or Zhensha Town (rival of the protagonist).

Introduction (protagonist version): Boys (girls) who grew up in Shuang Ye Town embarked on the journey of collecting illustrations and becoming Poké mon masters.

Introduction (Enemy Edition): As Professor Rowan's assistant, the girls (boys) in Zhensha Town travel all over the country for the purpose of completing illustrations, often helping the protagonist and giving things needed for travel.

Height 145cm, weight 38kg, which is the national average of 1 1 year-old boys surveyed by the Ministry of Education, Culture, Sports, Science and Technology in 2006.

When the player chooses the heroine, he also appears in the plot as Professor Rowan's assistant.