I don't think this is what Trixie had in mind when Dazzling Sparkle (Twilight Sparkle) asked if she could be in her act...

Dazzling Sparkle IS Twilight Sparkle in my AU "A Dazzling Gem". In this AU Twilight has sought the fame of being a master illusionist. One day she is called to perform at Ponyville where she meets a rather studious, rocky minded pony called Gem (Rarity). Oh and Nightmare Moon is also about to return...