1. Go to your eShop
2. Go all the way left till you get to Settings/Other (last option to the left).
3. Inside of Settings/Other, scroll down to and select "Your Downloads"
4. Choose the Ambassador game you wish to download.
(unfortunately you can only do one at a time and then it kicks you to the main menu)
5. Rinse, Wash, Repeat till you've downloaded them all.
edit: I see that I was beaten
It's ok, my post is numbered