Ok So i'm playing pokemon rejuvenation and just finished the hidden library 2 quest. I'm at the point where i have to choose between the ancient book or the blue moon ice cream. what is each one good for? I don't no what to choose!
Bu if you keep the book, you can get a Gothita and some backstory in Marianette's Mansion. Just hold onto the book and finish the quest after Marianette.