Bonus puzzle game
Enter the ship, hold A and press B 55 time. Arrange the tiles in order from 1 to 15 to collect 100 Gold.
Press Select + B.
Dragon Warrior reference
Find the three tombs located next to the white magic shop in Elfland. The tombstone farthest to the left reads:
"Here lies Erdrick"
This is a character from Dragon Warrior.
Northeast of the port town of Provaka is a two space wide peninsula with enemies from the Northern Continent. They offer a lot experience and are difficult to defeat unless you are around levels 12 or 13.
The following trick is an easy way a receive money and experience. As soon as you get the ship, go back to the first town and spend the night. Then, turn off the power, continue your game, go directly to your ship and go south. You will meet one to six Kyzuku. Go back to town, save, turn off the power, and repeat as many times as desired. Note: This does not work if you reset the NES, you must turn off the power.
Inside of the Ice cave (the one with the floater) is an Eye protecting a chest (with the floater in it). The Eye is worth 800 experience and dies in one or two hits.
After you get the Healing Staff, get in a battle with any weaker monsters. Kill all but one of them, then have someone use the staff and the others in your party use equipment that do not do anything. Continue until fully healed. This works well when going into the Ice Cave after the long river ride.
The location of the Adamant needed for Excalibur is in the tower in the sky -- you need the chime and the cube. Go in the tower and continue to the place with eight ways to travel. Go in the bottom left diagonal and fight the enemy that guards it. Open the treasure chest to get the Adamant.
Level up White Mages
In Astos' Castle, the northwest castle, is a room with three treasure chests with Undeads guarding them. The two upper ones are Mummies. Use two Harm spells to wipe them out to get 150 to 300 experience, and 600 to 1200 experience for using just two spells. This is most useful immediately after getting the key from the elf prince.
After you make your way through and kill Kary, fly with the airship to the waterfalls. Get the cube, then rescue the fairy for 50,000 gil. Then, talk to her at the town and receive Oxale. Go underwater to the submarine. Go up the stairs on the far left upper right corner and make your way through the stairs. You will finally get to a room filled with smaller rooms and mermaids.
Get all the boxes, then go to the top of the screen. Make your way to the left. There is a small passageway that leads across the room to the one room you could not get to earlier. Enter it and check the chest. You will find the Slab. Take it to the doctor in the town that was ravaged by the vampire. He will tell you a language. Go to the town he indicates, and talk to the people there until you get the Chime. Take the chime to the tower in the desert.
You can now get in without having to kill Karken. Go through and get everything in all the boxes, including the Adamantite on the higher levels. Take it to the dwarven smith. He will create Excalibur, the second strongest weapon in the game. Note: Only a fighter can use it.
Go to Bahamut's cave. Once you first enter, go to the bottom left part. The Zeus Glove will appear in the items screen if you are lucky -- There is a 1/300 chance of finding it.
Invisible guard in castle
In the first castle entered in the game, Castle Coneria, above Queen Jane's room is what appears to be a room with no one inside. Search around the room a bit, however, and you will realize that you can talk to someone although they are not there. After you rescue the princess, the message will change.
After defeating Litch, fighting Astos, and getting the T.N.T to the dwarf in the cave, instead of going straight to the town to fight the vampire, sail east. Keep sailing until you get to the town on the far east, with the little port slightly away from the town. The port is on a peninsula and is hard to miss. Go to the town and talk to the elves in the circle to receive the Canoe. From there, level up somewhere until you are at level 13 or higher. Return to your ship and sail north until you see a river.
Press the ship against the river to get into the canoe. Follow the river. When you follow the right path, you will end up at the Ice Cave. Go through quickly and get the Floater. If you have a Black Mage with Warp, use it. Otherwise, get out after getting the Floater without dying. Take the Floater all the way to the south of that continent. Find the desert with a river near by. Use the river to get out of your ship and to the desert. Use the Floater and summon the Airship.
Now that you have it, you can go north to the Dragon Isles. Just to the east of there is a castle. Land and go inside. Talk to the man there and follow the maze. Make sure you get everything found here, as there are some very useful items. Take the Rats Tail out after you get it. Take it to Bahamut and he will give you the Class Change.