The King of Bugs is really just Louie. Olimar saved him after the Titan Dweevil (sublevel 14 of the Dream Den) was defeated, and apparently, it was advisable to put him in the Ship's Pod because there are only two seats in the Ship. Louie now insists that everyone address him by his "proper title", the King of Bugs. It could be believed that Louie was actually controlling the Titan Dweevil; he was not even harmed when he was captured and saved.