Final Fantasy III

Excerpt:
If your stong enough to beat the final boss in Final Fantasy III, then check this out! There's an even thougher boss hiding in a secret dungeon. Here's how to unlock it.

1:Mail seven other PCs through Mog Net.

2:Mail The 4 Elderly 4 times.

3:Mail King Arusu 4 times. This will unlock a quest!

4:Get on your underwater ship and head for the floating island.

5:From the island, go south until you see a shadow.

6:Go underwater to find a cave with a secret dungeon in it.