The Panchowbies are Chowder and Panini's children. There are 50 Panchowbies, thus possibly, there are 25 sons and 25 daughters. In the series finale, Chowder Grows Up, at the end of the episode, Chowder and Panini get married, and she has 50 babies (20 of them were born in 1 day.) Chowder tells Panini to stop having babies for having this many.