It was from the She-Ra Princess of Power cartoon. During a scene at any point, Loo-Kee would hide in the background. At the end of the episode he would appear, give you another chance to find him and then tell you the moral of the story just as He-Man (and other characters) did in Masters of the Universe.
Here is an example (although they change the voice pitch on this one from high to low pitch to show the actual actor voice - High pitch is the actual character voice)
http://www.youtube.com/watch?v=6FO-k3wBrGs