The weird part: You can buy counterfeits on aliexpress. However, you never know what version they are burning and the cards may fail spontaneously because they usually lack quality control. But if you don't have an Everdrive or an Analogue Pocket or some emulation device, then this might be the only way to play the game on a good handheld.
Viewing post in Goodboy Galaxy (for GBA) comments
One cool thing you can do is buy a quality GBA Rumble cartridge from InsideGadgets and burn the ROM to it. Comes with FRAM for saving, and a rumble motor. Just patch the rumble in, and you're off to the races. Matthewmods on Etsy can set you up with a fresh, high quality label for the cartridge too.