First of all you must now that you can get this mega stone only in pokemon x. If you have pokemon x, then go to Lumiose City and talk to a taxi driver. Then select shopping and then stone emporium. He will drive you there. When you enter the building talk to the man in the up left. He can sell you Charizardite, Venusaurite and Blastoisite. At start it'll be very expensive but as time goes by and you become more stylish (buy new clothes from shops) his price will be going lower and lower.
In the event of you starting with Torchic in Pokémon Omega Ruby or Alpha Sapphire then you will be given the Blazikenite once you get to Route 120 otherwise you will need to make your way to Route 114 which is to the west of Fallarbor Town and find the Salesman by the body of water there that will be selling 2 of the Hoenn Starter Pokémon's Mega Stones, the two of which that you didn't start with.
After you complete the Primal Kyogre or Primal Groudon narrative, you can go to the left of Professor Birch's house to obtain the Mewtwonite X.
Mewtwo is unavailable in Omega Ruby and has to be transferred from another game
Mewtwo cannot be caught in Pokemon Omega Ruby and Alpha Sapphire.
no
No, you will need to trade for them or transfer them via Pokemon Bank to get them in Pokemon Omega Ruby and Alpha Sapphire.
No, there are no roms for Pokemon Omega Ruby and Alpha Sapphire currently nor a working 3DS emulator. (They are also incompatible with the Desmume emulator.)
No. Pokemon Omega Ruby and Alpha Saphire are remakes of Ruby and Sapphire, from 3rd Gen. Omega Ruby and Alpha Sapphire are in the same generation as X and Y, 6. Hope this helps you.^w^
You have to transfer it from your Pokewalker. You get it on Icy Mtn. Road.
It evolves by happiness
In Scorched Slab on B2F, after you complete the Primal Kyogre or Primal Groudon narrative,you can obtain the Charizardite Y in the bottom left corner of the floor.
You can catch Skitty in Pokemon Omega Ruby and Alpha Sapphire in the barks of trees.
Yes, Tm's in Pokemon Omega Ruby and Alpha Sapphire are re-useable
No, you will need to trade for them or transfer them via Pokemon Bank to get them in Pokemon Omega Ruby and Alpha Sapphire.
These Pokemon can be found before the National Dex: Latias (Alpha Sapphire), Latios (Omega Ruby), Kyogre (Alpha Sapphire), Groudon (Omega Ruby), Regirock, Regice, and Registeel. These Pokemon can only be obtained in the Delta Episode: Rayquaza and Deoxys. Post-National Dex Legendary Pokemon are: Regigigas, Ho-Oh (Omega Ruby), Lugia (Alpha Sapphire), Heatran, Mesprit, Uxie, Axelf, Palkia (Omega Ruby), Dialga (Alpha Sapphire), Giratina, Cobalion, Terrakion, Virizion, Reshiram (Omega Ruby), Zekrom (Alpha Sapphire), Kyurem, Raikou, Entei, Suicune, Tornadus (Omega Ruby), Thundurus (Alpha Sapphire), Landorus, and Cresselia.
No
It is not yet known if there is a building location for the GTS in Pokemon Omega Ruby and Alpha Sapphire.
The ability of Mega Diancie in Pokémon Omega Ruby and Alpha Sapphire is Magic Bounce.
Yes, all the TMs that were in Pokemon X and Y will be available as TMs in Pokemon Omega Ruby and Alpha Sapphire.
No, there are no roms for Pokemon Omega Ruby and Alpha Sapphire currently nor a working 3DS emulator. (They are also incompatible with the Desmume emulator.)
all of them
There is none