Hi, all! I'm new to the forums here but look forward to becoming a regular. I've been kicking around with my old GBASP for 2 years with exactly one game -- Yoshi's Island. I've been looking into a Flash cartridge so I can explore what else can be done with this old piece of equipment. Most of the Flash Cartridges I can find online have some form of DS in them (the DSTwo, for example) but none specifically for the GBA. Can these cartridges be used in my GBA (obviously not the smaller size, but many of them look to fit into the DS's GameBoy slot)? After following several 404ed links, I found this cartridge Real Hot Stuff SC SD Rumble which appears to fit the GBA but requiring an SD card (not a problem). Is this what I'm looking for? I'd hate to waste money on something I can't use. I don't own a DS, DSi, or DSXL. Just a GBASP. If I'm completely off, can anyone point me in the right direction? Is there an M3 or R4 cartridge that works better? Cheers!