Re: A question on Salamence
Yes, it is possible.
It requires two DS systems and access to the Poke Transfer Lab. You can send over the Salamence and play a little mini game to catch it. However, it can never return to the game it came from, similar to Pal Park.
In addition, it cannot have a held item or know an HM in order to transfer.
You must also have beaten the game to get access to it, I believe.