Funny story about GBA piracy.
A few years ago I bought a GBA Metal Slug game off of eBay, and it was supposedly from a guy in Canada. It arrives at my door with a return address located in India, and when I opened the box it was obviously pirated (it was pretty well-done, but the box was printed on cheap, glossy cardboard and the cartridge label was correct but not professionally done). So I emailed the guy and said "Hey, this looks pirated, I ordered a legit game. I want a refund". He told me to send it back to him - in Canada - and he issued me a full refund.
About six weeks later, the game wound up back on my doorstep marked Return to Sender. So I got a free pirated copy of Metal Slug Advance. Very weird, very shady. The game worked, though, not that I wanted it.