Ok now that I've had sleep and can think better.. I think we should give away either ghost, ice, or rock types. Ghosts are just cool. Ice for winter, rock for coal.
If the person says something nice they get ice, if they say something naughty they get coal, if they say both they get a ghost. lol.
As for the pokemon, I have Gengar, giratina, and rotom to give away for ghosts, and I would be willing to get a drifblim or froslass.
For Ice I have sneasel and snover and maybe walrein, i have to double check to make sure i can give them away. Although I don't really think sneasel fits as a nice pokemon lol. I could also get frosslass.
But for rock types I have nothing at all.
So what do you think of this?