gsc stands for gold silver and crystyl because they are all Pokemon games so gsc Pokemon are all Pokemon from Pokemon gold Pokemon silver and Pokemon crystyl and there it is you know the answer forever.
You can get Pokemon from the Honnen and Kanto region, and after beating the Elite Four you can get certain GSC Pokemon.
Same reason you fight Red in GSC.
The population of SG-GSC is 12.
GSC Systems was created in 1984.
No. None of the Pokemon games from the second and first generations (basically RBY and GSC) are transferable to anything from the third gen onwards.
Yes, it's a real Pokémon that you can get GSC and onwards. It evolves into Togetic and Togekiss.
You don't get to see it on any game other than GSC/HGSS
No there is no way of transfering from Crystal to Emerald. Only RBY to GSC, and Emerald to all games beyond.
GSC Game World ended in 2011.
GSC Game World was created in 1995.
SG-GSC was created on 2000-06-18.