Date: 7th May, 2014 • Length: 0:31
A very short announcement video showing the box art for Pokémon Omega Ruby & Alpha Sapphire.
Sneak peek footage
Date: 10th May, 2014 • Length: 0:39
Another short video showing brief clips of Groudon and Kyogre, without sound.
Primal Groudon & Primal Kyogre
Date: 10th June, 2014 • Length: 1:48
This live action trailer features a young boy exploring the wilderness. He enters a cave and finds an ancient drawing of Primal Groudon & Primal Kyogre on the wall. It comes to life, then we see the boy flying on a Latios, before we finally get some clips from the game. Mega Evolutions of the starters are shown as well as Primal Groudon and Primal Kyogre.
Date: 11th June, 2014 • Length: 0:53
Mega Sableye is revealed. It's shown Mega-evolving and using several moves.
Gameplay trailer 1
Date: 12th June, 2014 • Length: 1:52
First trailer featuring significant gameplay. Each of the three Hoenn starters are introduced along with their Mega Evolutions. Primal Groudon and Primal Kyogre are seen using unknown attacks. Finally, Mega Diancie is revealed.
Gameplay trailer 2
Date: 14th July, 2014 • Length: 1:52
Various gym leaders and Elite Four members are shown. Next, we are introduced to Cosplay Pikachu, followed by details of Secret Bases. Finally, Mega Metagross is revealed.
Gameplay trailer 3
Date: 10th August, 2014 • Length: 2:31
New Mega Evolutions available in ORAS are revealed: Altaria, Salamence and Lopunny. Details about Contests are announced, followed by footage of each of the Cosplay Pikachu in battle. Horde encounters are shown. Finally, we're given details of an event to obtain shiny Beldum.
Date: 14th August, 2014 • Length: 0:57
Following its reveal at Gamescom, Mega Audino is showcased in this official video and briefly seen in battle.
Date: 16th August, 2014 • Length: 1:11
Following its reveal at the Pokémon World Championships, Mega Slowbro is showcased in this official video and briefly seen in battle.
Primal Reversions & Mega Evolutions
Date: 12th September, 2014 • Length: 2:14
The abilities of Primal Groudon and Kyogre are revealed and demonstrated in battle, along with their signature moves. Rayquaza is also shown in battle. Finally, new Mega Evolutions are revealed: Camerupt, Sharpedo and Gallade.
Date: 2nd October, 2014 • Length: 0:56
Mega Rayquaza is revealed and its new Delta Stream ability demonstrated, along with its signature move, Dragon Ascent.
Mega Latios & Mega Latias
Date: 14th October, 2014 • Length: 2:28
Latios and Latias are confirmed to be exclusive to Omega Ruby and Alpha Sapphire respectively, and they both Mega Evolve. Next we see the Soaring feature in action, plus Mirage Spots. All the legendary Pokémon from other games are shown as being catchable in ORAS. Next, the DexNav feature is showcased, followed by the reveal of Mega Pidgeot and Mega Beedrill.
Date: 13th November, 2014 • Length: 1:52
The special chapter of the story in ORAS, the Delta Episode, is revealed. Deoxys is confirmed to be a part of it, plus a battle with Rayquaza. A mysterious new character, Zinnia, is also introduced. More legendary Pokémon are affirmed to be in Mirage Spots.
Date: 20th November, 2014 • Length: 4:06
A special trailer for Omega Ruby/Alpha Sapphire in the style of the cartoon series, featuring Ash & Misty.
Gameplay trailer 4
Date: 19th December, 2014 • Length: 1:26
Various gameplay footage.
Date: 14th January, 2015 • Length: 0:41
The mythical Pokémon Hoopa is officially revealed.
Date: 14th April, 2015 • Length: 0:56
The alternate form of Hoopa, known as Hoopa Unbound, is revealed.
Date: 14th December, 2015 • Length: 0:39
The mythical Pokémon Volcanion is revealed.