What would be the easiest/best one to get? And I'm in the UK - where would I order one from? Thank you!
It depends on what DS flash cart you have. Your safest bet would be an EZ 3in1 V GBA flash cart-order it from DealExtreme, I have ordered from them many different times and they are consistently reliable. miros
DealExtreme is an American company so not much use if you're in the UK. I use these guys http://techwizad.com/index1.html but sadly they have no EZ 3in1's in stock at the moment.