I wanted an Eevee to level up and evolve into a Vaporeon.
I went to the GTS, predicting I'd run into a trainer with an Eevee in seconds. With my luck, that would be difficult.
I was offering a Zoura (I had a Zoroark, so...)
The first trainer had the following message:
"Want to trade EEVEE?
Here's a hint: ZOURA."
Well, that was a match made in GTS Heaven.
And then we traded, and I lived happily ever after.
The End. xD