Dreaming in Moonlight

Cassie always fantasized about going on a Pokemon journey, yet she never imagined she would one day stumble into the fantasy world of her dreams. When she somehow finds herself in the Sinnoh region with nothing to her name, she's faced with trying to make a new life for herself in a world both familiar and all too unknown at once. There's a lot more to a Pokemon journey than the games ever bothered to show, after all, and she'll need all the help she can get. (Cross-posted on FF.net, AO3, and Spacebattles) — Description from novelcodex.org