With pages and pages of FCs, and the 3DS' limit to only adding 100, it's becoming extremely difficult to add, delete and then having to go through pages of FCs to don't the one you want. I think there should be a search bar that enables searches through usernames and FC. I've had sudden uninvited entrances and want to know whose FC the one that came into my town belongs to.
Dreamies that always slip: Lolly/Rosie, Lucky
Dreamies I've gotten: Wolfgang, Fauna, Blaire, Marshal and Carmen!
At present, there are two things you can do to find Friend Codes relatively quickly.
If you click on the word "User", which you will find at the top of the list on each page, this will sort the usernames alphabetically. Personally, I find that this helps to find a particular member's Friend Code more easily.
As for looking through the actual Friend Codes themselves, I would suggest using the "Ctrl + F" function in your browser.
I hope this helps at leats a little bit!
Sometimes it's the people no-one imagines anything of,
who do the things that no-one can imagine.