Genetics of Imaginary Friends

[Nebula]

Originally Posted by KazooBloo

Never thought about it. I thought they were made by kids and couldn't reproduce. I mean, wouldn't everything on their body be imaginary?

Well, it was established in Land of the Flea that IFs CAN definitely reproduce just like other biological beings do. Lauren Faust even confirmed this outside of the show. The general premise seems to be that at the moment that a Friend is created they cease to be anything abstract or "cartoony" and come into being as a flesh and blood creature.