It's really easy to get all the pictures without even knowing all or any information about your villagers
You just have to keep saying no to the question if you can recognize the real one until they tell two different birthdays, then you can look the real bithday up (for example here: http://http://nookipedia.com/wiki/List_of_villagers) and you're done.
If you have questions you can of course ask them
(And I didn't see a thread for this before, so sorry if there is already one)
If you have questions you can of course ask them
(And I didn't see a thread for this before, so sorry if there is already one)