The dark-squared bishop is not as bad as he looks (after ...e5). Actually, he has even more prospectivs than whites light-square bishop.
He can defend the pawn on d6 (as Conzipe wrote), he can go to b6 (where he will become extremly strong), he prevent f4 (f4 exf4 and he is becoming a monster) and he can become activ after ...Nf4 Bxf4 exf4.
I like this guy 
The dark-squared bishop is really a problem piece in the KID where it's usually (depending on which variation you play) blocked behind it's own pawns. And not surprisingly it's main job is a defensive task.
What black often makes the maneuver Rf7, Bf8, Rg7 which moves the bishop out of the way for the rook to come to the g-file and also the bishop does a good job defending the critical d6-square. This can also be done in some different ways like Kh8, Rg8, Bf8 is another way black can try to use this idea.
Interesting set-up Conzipe !
Do you know any top rated games in which one of these manoeuvres has been used ?
Thanks, Winnie
Thanks anyway !
Do you know a good book covering the basic stratetic ideas of the KID ?
As black, what is the general purpose of the dark-square bishop in the KID? I get what the light-square bishop should be trying to do, but when I'm doing the pawn storm it seems like the dark-square bishop isn't really able to do much and is often in the way. Is it supposed to be part of the attack? Am I supposed to get rid of the e5 pawn and open up its diagonal?