^Exactly.
I was going to vote "yes", but then i realized that Dash's guide already has that inside of it. The thing is: It's "clustered" in the middle of everything. After all, that's not a guide for the gym leaders, it's a guide for the entire game.
What you can do is help Dash. I'm pretty sure he know his way through the game, but if he forgot something, or didn't recommend something, you could remind him of other stuff that he can use.
voted no :I