Pokémon Omega Ruby & Alpha Sapphire is a bit of a big deal, bringing back and remastering two of the franchise's most beloved titles with all of the bells and whistles that the 3DS and the new 3D graphics engine allow. As it could be a title that's enjoyed on a daily basis, it may also be a good candidate for an eShop download as opposed to a physical cart.
You'll need a fair amount of space if that's your choice, however, as images of the download cards in Japan show that the titles will be roughly 1.8GB in Japan; we imagine they'll be a similar size in the West, potentially a little larger due to additional languages and localisation details. This is only around 100MB bigger than Pokémon X & Y, which was also sizeable. For context, that'd barely fit on the default 2GB SD card with a standard 3DS model, and would demand a little under half of the provided 4GB card in a 3DS XL. Nintendo, clearly aware of such issues, will include a 4GB micro-SD card with both the XL and standard 'New' Nintendo 3DS models.
Also recently released in Japan is an excellent new trailer for the titles, which includes plenty of lovely footage. If you want to play a fun game count how many times Pokémon is said in the video — quite a challenge.
Let us know what you think of this file size and the footage below.