Every morning (and during the day) I check the GTS for the following Pokemon:
Why do I check for these Pokemon? I do it because these six Pokemon are the ones you are most likely to catch within the first half hour of playing the game.
My aim, in looking for these Pokemon, is to trade the Diamond/Pearl starters away. I do this because many people are just getting their games going and they want to get all of the starters. If you do a search for the starters on GTS you often find people asking for Palkia and Dialga (level 100) and that is simply not a fair trade.
So, if you are looking for the starters you might find the ones I put up or you can take the easy method and post one of the above Pokemon and simply ask for one. If I do not get you one someone else probably will.
This Monday, June 4, I will be posting another farming article featuring a non-Diamond/Pearl starter Pokemon.