"Wallabee "Wally" Beetles", codename "Numbuh 4", is a major character and one of the five main characters in Codename: Kids Next Door. Brash and impulsive, Numbuh 4 serves as the main fighter of Sector V. To make up his lack of intelligence and thinking abilities, he is an expert of hand-to-hand and melee combat. Has a crush with Kuki Sanban. He first appears in HGSS23.