In Mauville City, there is a house south of the Bike Shop. In the house live a person called the "Rock Master". Talk to him, and he will give you TM 06, Rock Smash.
There is a house south of Pewter City that has a person willing to trade his Mr. Mime for an Abra. To get there, you can either go through the tunnel full of Diglett's (and occasional Dugtrio's) east of Vermilion City, or you can HM Cut the tree down south of Pewter City.
You get the secret potion by talking to the pharmacist in Cianwood City. His house is in the south, south east of the gym.
South-west of the light house.
You can give your Pokemon massages in a house south of the Veilstone Gym.
This only happens in the northern hemisphere, and the reason is becasue South is the main direction of the sun. It will rise in the South-east and set in the South-west, but a house facing South will get sunlight all day.
over the North pole
Because of the axial arrangement Chinese architecture was based on
A house with walls all facing in the same direction is a house that is sitting smack bang on top of the north pole. that way, all four walls are facing south. :D
If all directions are south, then the house stands on the north pole, and the bear is white.
Because of the tilt of the Sun in winter, the sun will strike the south facing windows facing windows for most of the day.
This depends on the specific location and orientation of the house. In the northern hemisphere, the south-facing side typically receives the most sunlight throughout the day. In the southern hemisphere, the north-facing side tends to get the most sunlight.
White - it is a polar bear. The house is on the North Pole, that's the only way all sides would face south.
The South Pole.
The only way this is possible is if the house is built directly on the North Pole.
because it is assumed everyone is facing west
If you are facing south, then east is to your left.