Ooh, I forgot my other challenge.

I bought my second copy of Golden Sun, The Lost Age used, and it still had a save file on it. The previous owner had apparently given up after being frustrated by the Star Magician to the point that he sold the game. Without grinding, just rearranging his Djinn and party, I took on the Star Magician and won. Just to prove I could. Heck of a battle, he wasn't as geared or leveled as I usually am, and he had missed some Djinn (probably not an import save), but I did it.