Here is an interesting image from the season one She-Ra episode "Book Burning". In this scene we see the villagers ordered to step back by the Horde Troopers. Upon careful inspection you will notice that the crowd is actually comprised of numerous character models from the infamous season two He-Man episode "Monster on the Mountain". It is interesting to see them colored differently and placed in a throwaway crowd shot.
(click on the image to see it at full-size)