Well, I only have three event Pokemon to my name; Shaymin, Darkrai and Deoxys. And since I don't want to trade my Shaymin nor my Darkrai...that only leaves Deoxys. Not much of a choice to choose from.
I didn't even know there was a Pikachu out there that could learn surf. I'm behind a bit I think. So, no, I don't have that one. Sorry. If I did though, I would trade it.
Even though I do own one, I'm currently not offering it up for trade. Maybe at a later time I would, but not now. I apologize that I'm not willing to trade it.