Numbuh Four is one of the main children from Codename: Kids Next Door as well as the shortest of the five. He is the Hand-to-Hand combat expert of Sector V. His real name is Wallabee Beetles and comes from Australia. His personality and slight dimwitted mind often gets him tricked or suckered. But despite this, he's got a strong sense of determination and never gives up in a fight. He hates all girly things, fears swimming and his phobias are girls and Rainbow Monkeys. But despite this, he has a hidden crush on fellow KND operative Numbuh Three. As an adult, he finally marries Numbuh Three and actually attends medical school while being a few inches taller than her.