I recently bought a 2nd hand DS and I'm pretty certain it's pre-flashed (the guy I bought it from denies it but he seemed a pretty paranoid type) and was just wondering if there's any way to know for certain. I haven't got a Slot-2 card to try out so I just used an original GBA cart. I set the macine to auto-boot inserted carts. Put my R4 in Slot-2 and my GBA cart in Slot-2. When I booted up it auto started the GBA cart. I powered down and booted up while holding select and the R4 started up. Is the DS pre-flashed? Sorry I'm a bit of a noob when it comes to the DS stuff and after looking around for info I reckon it's flashed but want some expert opinions! Cheers.