Skip and Rick.
Skip is one of ALF's Melmacian friends from planet Melmac. He first appeared in the original series episode Help Me, Rhonda, and was featured as a regular character in the animated series.
Before the destruction of Melmac, Skip saves Rhonda by taking her away in his spaceship. Skip tries to rescue ALF from Earth, but ALF hesitates because he doesn't want to leave the Tanner family and ultimately decides to remain on Earth.