The "Finding Zack Fair" legend is an urban legend revolving around the 1997 role-playing game Final Fantasy VII.
Description
In the game, Cloud Strife's former best friend only appears in flashbacks and does not appear in the game proper. This led to rumors that he was hidden somewhere in the game. The most common claim is that the Sephiroth Clone found living in the sewers of Midgar (specifically, the sick clone in Sector 5) is actually Zack. Interacting with him prompts Aerith to say "Sorry, I'm too weak to heal him!" This led many players to believe that they had to level her up to absurdly high levels and then return. Unfortunately, the Midgar sewers are only accessible with Aerith for a short period of time, meaning that players intent on exploring the rumors had to spend many hours grinding through low-level enemies. However, these same players would later find that this was all for not, as Zack does not have any appearances in the game aside from flashbacks.