Well lets see...the antlion/dragonfly, or the Land Shark?
Sorry Garchomp, I still don't like the fact that you've sided with Cynthia and that Serebii noobs use you waaaaaaaay too much, plus your shiny is unfortunately terrible.
So I'm siding with Flygon, who would've had potential if Gamefreak payed more attention to it. GIVE IT PEVERSITY GODDAMN IT. It's a Sand Dragon, come on! Also it looks plain awesome. It has goggle-like eye-protecters, it looks like its going to flat out kick your ass. If you've seen some of it's card art, you'll know what I'm talking about.
Also, it looks damn cute as well. So Flygon gets my vote.