Unow...wait, how do is pell it again? :P
Aanyway, humour aside, Unown wins because Dunsparce has a decent moveset, Magikarp evolves into Gyardos, Metapod has Bug Bite and Zubat has a decent moveset and evolves into Crobat. :) Plus, Unown's really not that special, apart from there being so many of them. >.<