The strategy guide is ok for finding Pokemon when you're reading through as you're playing through the game. It tells you on the page of that route which Pokemon you can catch, however there is no master-list Pokedex in this guide (there isn't even a Kalos Pokedex), which sucks, so you can't just flip a page to find where you can get a Pinsir, you actually have to go look on the page for every route until you find it.
I'm waiting for them to come out with the big Pokedex strategy guide. I didn't get the one for BW/BW2, but the one for Platinum is amazing...it had all the Pokemon through Sinnoh in it, telling what move each learned and at what level, the Sinnoh Pokemon even had egg moves and TM/HM moves. I wish I had that for this game!