Type Preview: Dragon

It's a type so devestating for two generations they had to introduce a hard counter to stop it, and THAT didn't appear to help. It's a group of Pokemon who count among its numbers over 50% of the psuedo-legendaries, and as a group they have the highest collective stats in the game.

Get the Sisqo blaring, it's time to unleash the Dragons. (FINALLY! GEEZ! - Kaiba, Yu-Gi-Oh Abridged)

Type Effectiveness
Attacking: Super-effects itself, resisted by Steel, no damage to Fairy.
Defending: Super effected by Ice, itself and Fairy. Resists Fire, Water, Electric, and Grass. Yeah, I'd take those too.

Dual types:
Thanks to Mega evos, Fire, Water, Electric, Poison, Ground, Flying, Rock and Dark are available in game. Postgame adds Ice, Psychic, Ghost, and Steel.

Probable Final Team:
Bagon/Shelgon/Salamence: I don't even have to remember to use Fly once I get Salamence since he'll learn it naturally. Provides air coverage and hyper-offense, plus Intimidate is always fun.

Skrelp/Dragalgae: Look, I'm aware this is supposed to be an X run. This is purely for research purposes, as I want to see if carrying a Poison/Dragon actually means anything in the endgame so I can say you would be best served doing the Dragon run in Y. (It will come in at L1, as I'm sending an egg through Bank.)

Tyrunt/Tyrantrum: Played his way onto the team in the Rock run, and now we don't have to worry about wasting moveslots all the time.

Mareep/Flaaffy/Ampharos: Only qualifies as a Dragon for purposes of this run by virtue of the Mega evo, but that's good enough for me. Will fill some holes in the coverage if nothing else, and I'd like to carry STAB Thunderbolts for things like Mega-Gyarados.

Gible/Gabite/Garchomp: Will spend a grand total of about five minutes as a Gible, STAB Ground is always handy, even if he is a little redundant with Tyrantrum. We'll make it work, though.

Goomy/Sliggoo/Goodra: Probably the most controversial pick of the bunch, especially given the hoops I have to jump through to get the damn thing to evolve. Main purpose is to provide physical/special balance, so I'm hoping to get something like Rash or Modest. Has access to Sludge Bomb AND Ice Beam for some reason.

Why not use...?
Charmander/Charmeleon/Mega Charizard X: It'll be the run inagurator, but I'm not going to go all the way with it simply because I need Ampharos more and to keep in the spirit of the run, I can't let either one be unable to go Mega.

Axew/Fraxure/Haxorus: If there were more Levitators in this game I'd keep it around, but it's made redundant by Bagon (ON THE NEXT ROUTE) and Goodra. (Either one of them could fill in for Tyrantrum if I don't feel like taking it again, but Haxorus is more likely to do so.)

Horsea/Seadra/Kingdra: Evo item is pre-8th badge, and it's a trade evo.

Trapinch/Vibrava/Flygon: Uh, Gible is RIGHT THERE. Awkward middle phase as a Vibrava.

Noibat/Noivern: Comes in too late (post-Flare) or it'd be in the Salamence slot.

Swablu/Altaria, Dratini/Dragonair/Dragonite, Druddigon, Zweilous/Hydreigon: Come in even later (realistically, I'm IN Snowbelle next to an Ice gym for the first two, and in Victory friggin'  Road for the last two).

Major Battle Expectations:
Viola: Don't have anyone at that point, but I'm probably grabbing Froakie so it'll probably involve use of a Fletchling.
Grant: Bulldoze rocking faces should get us through here.
Korrina: No real positives or negatives, though I'll probably be swapping Mareep/Flaaffy/Ampharos in a lot.
Ramos: Everyone resists Grass, so that'll make things easier.
Clemont: Gabite will shine here, with Tyrunt on standby/Emolga destruction duty.
Valerie: Eeeeh... Poison Jab TM working overtime here, I think. As well as Skrelp.
Olympia: All about the power and some Amphabulous Thunderbolt action.
Wulfric: Should be able to overwhelm the Ice types, I just can't afford to get hit.

Rival: I'm taking any possibility of decent damage away by grabbing Froakie, so I'm expecting to stall out Absol and waste Chesnaught, especially when Salamence hits.
Team Flare: Sheer power and Gabite/Garchomp win the day here.
Elite 4: Aside from Steel, these are all extremely winnable matchups.
Champion: Going to have to overwhelm and find a way to outrun Mega Gardevoir (Good luck).

Trainer:
Pokemon has a rich history of dragon trainers, but for this one I'm going to look to another fandom... the realm of professional wrestling, as it turns out. From Vainville Town, 140 pounds, Ricky "The Dragon". As for the nicknames? Probably a lot of mythological references.