Voting aragornbird.
Wyverii's has a few things I can't get over;
- The colour. Yeah I said it. I don't know what types I'd guess at in-game, but it wouldn't be ghost/steel...
-It's too complex. Some of the shading/fur effect looks too fancy for the cartoonish D/P/Pt sprites. Examples include the tail of the front sprite, and the neck/right of the back sprite.
finally, the #1 reason I didn't vote for it....
-The mouthless face looks like a Moomin.
Don't get me wrong, its an incredible sprite, I just don't think it 'fits' as well.