Bobby (left) gets "the talk" from Observer.
Buddy is the name of one of the lost Space Children who encounter Pearl, Bobo, and Observer on the Camping Planet. He first appears in Episode #811. Buddy is played by Michael J. Nelson. The role is credited only as "Space Children", along with Scooter (played by Paul Chaplin) and Darlene (played by Bridget Jones).
Buddy and the other Space Children were very powerful, and their exact origins are unknown. Their childish nature annoyed Pearl and Observer, but Bobo found them delightful.
The Space Children were eventually returned to their parents (in Episode #812), who were grateful to Pearl.