and secondly, read this http://gonintendo.com/?p=2126
I have played through this game (almost. I'm at the final boss and can't beat him). That guy says "I am Error" for a reason. IGN makes it seem like Nintendo went crazy for a second and just put that in there out of the blue. But, the reason he tells you that is because that is actually his name. As for why they picked the name Error, I think it is because you will remember reading that name later on in the game.
Later on in the game, you find a house in the woods or something like that. The guy who lives in the house tells you to go find "Error" and get something from him.
So, I don't know if IGN has even played through the whole game, or maybe they just don't remember. But, He is named Error for that reason.
Just lettin you guys know.
Edit* Thanks Bjorna. I had no idea how to do that.