Can transfer your Pokémon in these games to Pokémon Bank to use in Sun/Moon.
Edit: From Nintendo UK
With a Nintendo Account, you can save 36% on the regular price of Pokémon Red Version, Pokémon Blue Version and Pokémon Yellow Version: Special Pikachu Edition until 04/09/2017. Without a Nintendo Account, you can still save 20%.
https://www.nintendo.co.uk/News/2017/August/Nintendo-eShop-s…
So should be $10.40 if you haven't linked, I've linked so I'm seeing $8.32
I love backward compatibility, even when it's just emulated versions of old games.
But Nintendo's pricing is bullshit.