Bai-Bai the Furret
The first Pokemon game I ever played was Pokemon Silver.
I chose a Chikorita as my starter. The first Pokemon I ever caught was a female Sentret I named Bai-Bai. Eventually she evolved and was in my team all the way until the Elite 4.
So Bai-Bai is sort of special.
You can probably guess what the first thing I did was when I got SoulSilver.
(I chose a Chikorita again BTW)
Bai-Bai (c) Me
Pokemon (c) GameFreak, Nintendo, etc