This story may seem silly, but fact is fact, that's what happened:
When I was younger, and the Master System was the video game of the moment, I had serious discussions with a school friend who always told me that he knew the best games and also had the best games. The financial conditions of our families were different, I was poorer and his family, richer. Accustomed to traveling abroad, one time he once came to school bragging about having bought the best game of his life, "Wonder Boy in Monster Land".
Of course I had already won the "Mônica no Castelo do Dragão", which I argued to be the best game I had played for Master System. We engage in a discussion where each defended his game, not knowing that we were talking about the same game. Understand that at that time, we had no knowledge that games could be modified and released in different countries.
Well, it was common to have birthday parties with fellow students at their home, and i ended up going to his house and saw that the "Wonder Boy in Monster Land" was the same as "Mônica no Castelo do Dragão" and the discussion has turned out to who copied whom.
Years later I discovered that I had already lost the argument, because the Brazilian version was a copy of the U.S..
written by FadWare 
1 Retro Joysticks