I think you get it from a guy in the safari zone
you cant get defog because you dont need defog in the game
there is no defog in Pokemon soul silver
you must learn the move defog.
defog is not in emerald,
there is no defog in pokemon black/white
You get defog from a person in the safari zone.
The HM defog is in the grate marsh.the guy on the right has it.
go route *** and talk ************* guy. He give u defog
Defog is located on the Great Marsh in Diamond and Pearl.Defog is located in the Solaceon Ruins in Platinum.Outside of battle, Defog clears away fog
you get hm strength and hm defog after defeating two gym leader.Fantina(defog) Byron(strength).
click the menu button and choose Pokemon. choose the Pokemon that have learned defog, a list will come out (summary, switch, defog, cancel and etc,) choose defog. your Pokemon will then perform defog.
you find defog at the safari zone right when you walk in you go to a girl and she gives you defog Toe311,but its diferrent on platinum