Error

Error is a citizen of the town of Ruto in the Zelda II: The Adventure of Link. A rather infamous NPC, he is found inside of a house, which usually denotes that the occupant has something vital to tell Link, but he merely repeats his single line of "I AM ERROR" until the player meets a second man in Mido Town, at which point an attempt to converse with Error will provide the player with information on how to find the passage to the third palace.

Error's single, seemingly unhelpful line was met with confusion and amusement from many players, giving him almost legendary status in fandom.