This is the first pokemon card I ever remember having. 63/132 of Diamond and Pearl Secret Wonders: Sableye. Not knowing really anything about pokemon (well, except for Pikachu, that little yellow mouse guy was everywhere) I remember being struck by the card art. Sableye just looked like it _belonged_ in the world it existed in. It didn't look like a fantastical monster or unbeatable creature, it looked like a part of it's enviorment. I pictured a happy little creature, living a peaceful life in caves, curious, and living in harmony with nearby humans.
The older I got, the favoritism stuck. Since then, in every pokemon game I've played, I've made sure to have a sableye on my team (ironically enough, when BDSP came out, I got diamond without checking the exclusives, but I was able to trade for a sableye from a friend who had pearl!)