This book doesn't tell how to get to the secret cave and it doesn't tell how to break the secret code. But there are some good things. It has 200 pokemons in its pokedex; it tells how many levels a pokemon will evolve, and like Groudon, when Groudon is at Level 50 it will learn Rest. And this book will tell what HM/TM that a pokemon can learn. It will tell what a pokemon is afraid of or not afraid of and it will tell which type of the pokemon it is.