When Mark Wells and Twilight Sparkle were bouncing around alternate worlds in pursuit of Starlight Glimmer, Mark encountered several different versions of himself. With everything back to normal, he took the opportunity to spend some time with the different Marks to learn how their lives had been like before and after arriving in their Equestria. One Mark was a unicorn instead of a pegasus, another was a bipedal anthro version, a third was a mare, but the fourth had become a griffon instead! Yet they all shared the same color scheme and the same basic personality.

Art by Pinefool - https://twitter.com/pinefool/status.....75656450482176