Hey there Calyxsie, it's going to be a little tough to find any information about it myself if I don't know what it looks like. Maybe you could describe it a little more (is it a plushie/plastic?, etc.), or even post around a little bit more so that you can add links to your posts, and then come back here. Either way, unless it's a rare piece of merchandise, I wouldn't expect it to be worth much more than what you paid for it.
And we've got a thread dedicated to Pokemon merchandise and questions about it, so I'm going to merge your thread over there for you.
MERGED.