I'm going to assume its different from every game with factors such as how much text has to be translated, laws of that country, what languages it has to be translated into etc,. I want to know what  the average cost to localize a game by genre for each system(mostly DS PSP and Wii, but the more info the better) is? If so could anybody provide examples on games and their localization costs?   If anybody could help, thanks.

I have no idea.

HOWEVER, if a company doesn't bring a game to a territory, it may not just be due to the cost getting it localized. One cost alot of people arn't aware of is when the game companies are manufacturing all these games, they have to pay Sony / Microsoft / Nintendo an estimated 10% royalty fee on it's RRP. Unlike most industries these fees are paid when the game is manufactured, not sold.

So if the company doesn't think they can sell alot of copies they won't want to risk having to pay a good half a million on just royalties alone. Then there is manufacturing costs on top.