If you haven't gathered from the game's title, it doesn't run on older models of the 3DS at all. (gamingnexus.com)
I second loudly the wanting of older models in the fashion industry but I fear it will fall on deaf ears! (michelle-tyler.com)
There is often just a single table with older models available for the public to interact with and seldom do you have anyone working there that is trained in all of the products. (goodereader.com)