The Wish (A Pokémon Fanfiction)

"It's been 500 years since the wish Pokémon, Jirachi, was last seen. Legend has it that she will be seen again when right one needs her most and when she needs that human, The chosen one, as they are called, will be a trainer who doesn't have the same goal as the others on the same journey as them.
That's weird, usually it says if they're a male or female or at least some type of hint as to who they might be or look like. How are we supposed to do anything with this?"
"Just shut up and continue reading. Also remember this book is old and we're in a library alone so what do you expect?"
"You have a point, but fine I'll continue reading.
Jirachi will appear before the trainer when they are given an impossible choice and show them the right way. She will stay with the trainer from then on, up until the trainer dies. The trainer will have a powerful team, but the trainer themselves won't be as powerful and is forced to keep a secret from everyone, including their friends.
That trainer will be the daughter of one powerful team boss and the niece of someone who isn't. They will live with the aunt and uncle after they turn 10 until they leave for their journey eight years later."

Giovanni not only has a son, Silver, but he also has a daughter no one knows about. Well save for a few people. Her name is Rosemary, and she is the opposite of what everyone would expect.