A couple years back, just after the release of Emerald, I went to Cyprus for a couple of weeks. I ended up wanting to buy Emerald since prices were relatively cheap over there, so I did. The game seemed perfectly legitimate, apart from it had the normal grey casing, not the transparent green one. It worked fine, until I completed the Pokemon League and my save file automatically deleted. It did that on three seperate occasions.
Since it was fake, I went and bought another one. Instead, inside the box, was a game called Pokemon Green Diamond. The manual inside showed that it was what appeared to be, a complete hack of Gold, Silver and Crystal (which I didn't know at the time, since i was young and fairly retarded). I ended up playing it and I didnt even get a hack of Gold, Silver nor Crystal, but a hack of a Mario game with Pikachu as the character, and various Pokemon as Goombas etc. I finished the game within 15 minutes (It had about 5 levels), and it even had built in cheats.
Let's just say, I was kinda pissed off.