Pokémon Omega Ruby and Pokémon Alpha Sapphire announced

 Day 2 leaked stuff so far

• Hoopas form is 21 feet tall.
  
• We now know how Primal Reversion should be triggered:
  
   Spoiler
  

  Primal Reversion should be triggered by Red / Blue Orb as a held item. They are no longer Key Items.
  Jade Orb: 00 00 00 00 00 00 00 00 1F 02 00 00 00 00 00 FF [00..] Still Key Item
  Red Orb: 00 00 00 00 00 00 00 00 1F 00 00 00 00 01 00 68 [00..]
  Blue Orb: 00 00 00 00 00 00 00 00 1F 00 00 00 00 01 00 68 [00..]
  Key Items have 3F/1F "02", as the 9th bit of that u16 is the "Key Item" flag. Red/Blue no longer have them!
  Stubbed Key Items (that shouldn't be obtainable) usually are FF for bag position priority.
  
• Mega/Primal marks and XY badges (dunno why these are here)
  
• Pokemon Height listing
  
• VS Seeker is still an unusable key item.
  
• Hyperspace Fury for some reason is coded to fail when used by any Pokemon other than Hoopa.
  
• Cloud Nine move usage is not restricted by Heavy Weather, Mold Breaker however is still restricted.
  
• Switching/fainting a Pokemon with a heavy weather ability will cause it to cease.
  
• Switching in a Heavy Weather Pokemon will override the current Heavy Weather.
  
• Switching in a Heavy Weather will override existing Heavy Weather (last in speed bracket).
  

Mega Stone Index Numbers Dumped from Mega Evolution Map Files:

• 752 - 80 BP Fling 1/92 - Swampert
  
• 753 - 80 BP Fling 1/75 - Sceptile
  
• 754 - 80 BP Fling 1/8F - Sableye
  
• 755 - 80 BP Fling 1/7A - Altaria
  
• 756 - 80 BP Fling 1/6A - Gallade
  
• 757 - 80 BP Fling 1/78 - Audino
  
• 758 - 80 BP Fling 1/8D - Metagross
  
• 759 - 80 BP Fling 1/74 - Sharpedo
  
• 760 - 80 BP Fling 1/8E - Slowbro
  
• 761 - 80 BP Fling 1/7D - Steelix
  
• 762 - 80 BP Fling 1/82 - Pidgeot
  
• 763 - 80 BP Fling 1/6B - Glalie
  
• 764 - 80 BP Fling 1/7B - Diancie
  
• 765 - Key Item (Usable)/23 - Not a mega stone.
  
• 766 - Key Item /10 - Not a mega stone.
  
• 767 - 80 BP Fling 1/7E - Camerupt
  
• 768 - 80 BP Fling 1/8A - Lopunny
  
• 769 - 80 BP Fling 1/88 - Salamence
  
• 770 - 80 BP Fling 1/77 - Beedrill
  

Habitat List Confirmed; Black/White Flute (high/low level influence) confirmed.
Prism Scale can no longer be obtained via Pickup. Destiny Knot is now found instead. Beauty evolution encouraged!

TM94 Secret Power*
HM01 Cut
HM02 Fly
HM03 Surf
HM04 Strength
HM05 Waterfall
HM06 Rock Smash*

Pokemon Files (PKX/EKX) easily dumped, SHINY VALUES return for ORAS (as expected). No change in size/usage structure. Pokemon memories confirmed to be in ORAS. Assuming no modification when traded, ORAS mons will show a Pentagon in X/Y.

Demo's game-origin value is 26, right after X/Y's 24/25. Alpha Sapphire is 26, which is the demo's base; Omega Ruby is 27. Only 2 more games can display a Pentagon on X/Y (28/29), subsequently numbered games will not.

Ability Index Numbers
189 - Primordial Sea
190 - Desolate Land
191 - Delta Stream

Hoenn Regional Dex