lol sorry man xD Heres what the Gen 5 RNG thread says:
To remove fog or sand storm in any area, follow these steps as your last part of setting up to abuse.
Save the game in the area you are abusing.
Change your DS clock's date to one month ahead of what you just saved at in game.
Enter the game at any time and encounter a wild Pokemon. When the battle ends, the season will change and the fog/sand will disappear.
Save your game, now you can start abusing on whatever date your seed dictates.