General

You can get the other lati@s not in your game by getting the Eon Ticket, which can be received by streetpassing someone with the Eon Ticket.

Also, don't forget to hop onto Mystery Gift and get a Shiny Beldum with it's mega stone.

Also if you haven't already, get an ORAS demo code so you can get Mega Glalie (Or mega Steelix if you're in Japan)

Are both games split up between who you're fighting, or does it follow more of the Emerald storyline where you fight both at the same time?

I never really played Ruby or Sapphire, all of my experience was with Emerald, so, I'm kinda torn on which game to get.

They follow the Ruby/Sapphire split storyline, not the Emerald connected one, though there is an extra 'Delta Episode' that is the same for both games after you beat the main storyline.

You'll be fighting against Team Magma in Omega Ruby while Team Aqua will be friendly, and in Alpha Sapphire you'll be fighting against Team Aqua while Team Magma will be friendly.

West Sea (Pink/Brown) Shellos/Gastrodon is exclusive to Omega Ruby, and East Sea (Blue/Green) Shellos/Gastrodon is exclusive to Alpha Sapphire.

Also the DexNav will allow you to find wild Pokemon with egg moves - beware as some of them may hit you really hard at early levels.

More Pokemon have their own Surf sprites too. Kyogre moves a little faster than normal, and Sharpedo moves twice as fast, interestingly.

Edit: For those who like the Lucky Egg item which boosts experience gain, you can find it by using the DexNav on wild Pelipper's.

I finished Alpha Sapphire in three days like I did with X and Y, already been through the Delta Episode and started hunting down the legendaries. Already have Cobalion, Cresselia, Rayquaza, and Mesprit. Have yet to find Zekrom, Reshiram, Giratina, and Kyurem soaring on Latios over Hoenn...I also have to go back and re-capture Primal Kyogre and Deoxys, I killed them both the first time.

I liked the Delta episode, it set down some interesting things for a bridge game like say Pokemon Z or Delta Emerald to span both Kalos and Hoenn with the Battle Frontier as the connector. A lot of hints were dropped at the Battle Resort that there WILL be a Battle Frontier created for the next set of games just like in the original Emerald where it was first introduced. I never got to see it in the original Emerald, I COULD NOT beat the Pokemon League.

Preview video of a new legendary Pokemon, Hoopa, a Psychic/Ghost type. Seems to be based off a djinn (some may know these as genies):

Apparently Hoopa will be the event Pokemon release for the 2015 XY movie in July this year, hints were dropped in trailers about it and we see the same rings that are in ORAS for the legendaries on the Mirage spots. Unfortunately since I have to be part of the North American event release we won't get it until 2016 after they've CG'd the hell out of the movie and dubbed it for us stoopid North Americans who don't want to make the effort to read subs.

Funnily enough, Gen VI is the only one so far that doesn't have a legendary trio (like Articuno/Zapdos/Moltres) at all. It's interesting.

Then what does that make Xerneas, Yvetal and Zygarde if not another legend trio? Or Diancie, Hoopa and Volcanion?

True, though they're more of a 'greater' legendary trio, like Kyogre/Groudon/Rayquaza, Dialga/Palkia/Giratina and Reshiram/Zekrom/Kyurem, rather than a 'lesser' legendary trio, and it's the first time we haven't had any of those. 'Greater' legendaries tend to be banned from normal tournament play due to their far superior stats (avoids the game turning into nothing but teams of them vs their counters). Also Diancie, Hoopa and Volcanion are unrelated.

Gen 1: Articuno/Zapdos/Moltres, Mewtwo-Mew*
Gen 2: Raikou/Entei/Suicune, Lugia/Ho-Oh, Celebi
Gen 3: Regirock/Regice/Registeel, Latias/Latios, Groudon/Kyogre/Rayquaza, Jirachi, Deoxys
Gen 4: Uxie/Mesprit/Azelf, Dialga/Palkia/Giratina, Lunatone/Darkrai, Manaphy-Phione*, Heatran, Regigigas, Shaymin, Arceus
Gen 5: Cobalion/Virizion/Terrakion/Keldeo, Tornadus/Thundurus/Landorus, Reshiram/Zekrom/Kyurem, Victini, Meloetta, Genesect
Gen 6: Xerneas/Yveltal/Zygarde, Diancie, Hoopa, Volcanion(TBA)

*-not equal stats to their other partner but still a connection