The listing, POKEMON ORAS DEMO CODE 3/4 has ended.
"The Pokémon Omega Ruby & Alpha Sapphire Special Demo Version is set briefly in Mossdeep City. This demo has you select a starter Pokémon between Grovyle, Combusken & Marshtomp. From there, you travel throughout Mossdeep City, finding trainers and even encountering both Team Aqua and Team Magma admins in a nearby cave
This allows you to encounter various Pokémon including Loudred, Nosepass, Linoone & Slakoth, all of which originated in Pokémon Ruby & Sapphire. The demo will culminate in the obtaining of a Mega Evolution, one which has never been seen outside of this demo before now. They also wish for you to play the demo every day, saying something special will happen if so."
"This demo is rather unique in that it will allow you to transfer aspects of the demo to the main Pokémon Omega Ruby & Alpha Sapphire games once purchased. This is done through the Pokémon Link feature of the games.
The demo will allow you to send over any items that you have collected throughout the playing of the demo, as well as the special Mega Evolved Pokémon that is encountered within this demo!"
Rewards may include:
Mega Steelix
Mega Glalie
PokéBall Set
Heal Ball Set
Heart Scale Set x2