So, recently, my ds games have been freezing on me and my girlfriends 3ds'. Heartgold, diamond, and pearl have been affected. They all have frozen when in sleep mode, and just pearl when actually playing, it just froze and tons of progress was lost. The games are in perfect condition, and i'd really like to know why this keeps happening. We've both got CFW 3DS' so if theres any modifications we can do, we can try them out. Thanks everyone who's willing to help in advance.