YEAH! I remember that episode!!! Skeletor found this cool mirror in a cave that creates a duplicate of someone with the opposite alignment (good->evil and evil->good... wonder what happens if you're neutral???) Anyway, he makes an evil dupe of one of He-Man's friends and the dupe tricks He-Man into letting him into Castle Grayskull and stuff.... but the REAL He-Man's friend is quite clever, and he gets Skeletor to stand in front of the mirror and now we have a GOOD Skeletor (!!!) who heads off to the royal palace to warn everyone. Then He-Man and his friends are confronted by TWO Skeletors and don't know which one is which. So He-Man is like: "Skeletors... repeat after me: 'He-Man is my friend!'" and naturally the evil Skeletor couldn't say it and then He-Man kicked his butt (again).
LOL TOO EZ BONE-FACE...
Uh... I'm going to run along and watch some more He-Man. Night all.
-Warik