I used my KAM snap press for the closure. The fabric is Amy Butler Midwest Modern.
I used one fabric for the outer and inner main part, and another fabric for the flap and pockets. I used 200wt fleece for padding.
I needed to make the game pockets and pen holder a little tighter, they work but I would be more comfortable if everything was really snug.
I don't think when its all rolled up that there is much chance of things falling out but when opening it I feel the games could slip.
Thanks again to Tracy for the link to her DS Pouch, it was very helpful to see how you made yours. http://madquilter.blogspot.com/2009/02/nintendo-ds-pouch-tutorial.html