over 9,0000!
There are no Nintendo DS games that 'require' two people to play them, However several games have wifi compatability.
As Nintendo has discontinued their sale, you're best off looking for one on one of many online auction/sale sites such as eBay or Craigslist.
Mystery Gift, on Nintendo wifi connection, or sometimes they have these in promotional stores like gamestop. Check Nintendo's website for more details. Sources: Nintendo, Cousin(works there), personal knowledge, and many Nintendo licensed games (Pokemon, etc.)
No Also many people think spore PC is wifi but it is not.
some people have them although they are from Nintendo events and would probably only trade them for a high level, other Nintendo event Pokemon, or a shiny Pokemon.
I am not sure but it does as there is many people that have it and are my friends who manage to hack into our school's wifi or WLAN
Wifi boosters are ways of boosting your wifi connection/speed they are tricks to supposedly make your wifi stronger
About half of the people in the Usa.
The number cannot be calculated as thousands of people receive and give up Nintendo DS' daily.
As of 2011, there was 4712 people working for Nintendo. Source: http://www.nintendo.co.jp/ir/pdf/2010/100506e.pdf
10 watt each second.
There are currently many people working for Nintendo and making the games and the systems, so yes anyone can work for Nintendo if they have the right education.