I wanted the previous poll to last until Mid-Day 3, but that didn't work, so I decided to call that poll Day 2.5, and make this poll whilst I wait for the results of Day 3.5. Anyway, I vote for Hydreigon.
Day 1 (Favourite Mega Evolution Part 1): Mega Charizard X (31.37% / 16/51 Votes) Day 2 (Favourite Mega Evolution Part 2): Mega Ampharos (21.95% / 9/41 Votes) Day 2.5 (Favourite Mega Evolution Part 3): Mega Aggron (24.24% / 8/33 Votes)
GENERATION 118: (I had to cut the rest off since it wouldn't fit) http://i.imgur.com/76cdK59.png Spoink > all
Goodra's cool, but it's sad that it seems to lack some luster when it comes to comparison between the pseudo legends. It's the only one with a single typing which isn't a big deal, but many people thought it would be the first poison/dragon even though it did happen with Dragalge. This does mean that Goodra has no 4x weakness, but it also only has one STAB. That's circumvented by the fact that Salamance's second STAB is basically nonexistent, and Dragonite barely comes close by being a decent user of Hurricane. I think that Goodra has simply yet to develop through move tutors like the others, and with a solid recovery move it could be pretty good. It does have the awesome ability Gooey, unique to its line, which shows great potential for the future.
tl;dr - I picked Tyranitar, it's always been one of my top favorite pokemon.
3DS Friend Code: 3110-5068-2757 Grass type Friend Safari with Sunkern, Petilil, and Maractus