I suppose it's possible in theory, though it seems unlikely. Writing a book is a rather more complex and involved process than simply filling out a form or submitting a response through the pokegear, after all. Aside from writing the entire manuscript, it's also necessary to have the book printed and, ideally, distributed to various stores at which it can be sold. Considering that many people who have ambitions to do all that still don't always succeed, I imagine it would be even more difficult for a pokemon to accomplish the same.
no subject