I bet they're using swoobat/woobat because they can't not put in an annoying bat, and Noivern is simply it's 3rd evo.
No. Stop comparing Swoobat and Noivern. Bat =/= wyvern, and they're entirely different concepts (love vs noise).
*facepalm* It's OBVIOUSLY a bat as well as a wyvern. It has bat ears, a bat nose, and the same white tuft as the two bats I am referencing. Why people need to feign ignorance to prove their point, I will never know. Obviously you know it resembles a bat *and* a wyvern.
It's not close enough to be a definite match for a swoobat evo, I'll give you that, but it's close enough for me to question it.
Besides, love, sound, who cares? Nintendo has done stranger things. It would be kind of cool if the way to get a Noivern was to make a woobat love y ou and turn into a swoobat, then you have to make the swoobat hate you to turn into a noivern.
I'm not claiming any of this to be true, I just see this stuff as a possibility.
http://www.youtube.com/watch?v=GtxCr5ju2EE&feature=related - If you played Mystical Ninja 64, you need to click this.