When you get to Venus Lighthouse, there is a secret passage to get to the room with the lit floor. You have to go to the room with electricity (barring you from going through) and use reveal beside the sign on the wall and you will be able to get to the statue and continue your quest.
Isaac Learns Revive
Instead of wasting all your money to revive your friends, you can use PP. Switch all djinni from Isaac to Mia (ground-->water), then Isaac should have the power to revive.
PS: Isaac has to be at a decent level to be able to use revive.
Editor's note: as a Swordsman, Isaac will learn revive at level 19.
When you find a purple Psynergy Stone, get it. If you leave, and come back later, it will have returned. (may not work in all areas)
Earth Djinn Locations
Flint: obvious, outside Vale
Granite: kolima (go behind a house,shop, whatever)
Quartz: mogall forest
Vine: on a small island after getting out of Lamakin desert
Sap: Vault cave - requires reveal, and a bone for the dog
Ground: Kalay docks - go around the sea once you have crossed it
Bane: Crossbone isle - don't use douse on the tempest lizard
Get Power Bread in Vale
Once Ivan has joined your party go to Vale. North of the Psynergy Stone there will be two leaf passages. Use Ivan's Whirlwind (Psynergy) to clear the leaves so you can go through the entrance of the cave. Go in the cave and get the Power Bread. The Power Bread increases your maximum HP. The second leaf passage is has nothing.
Get Granite (Venus) in Kolima Village
In Kolima Village go to the house with the djinni in a fence. Go on the opposite side of the house from the front door. Press down and you will get in a secret passage. Go down the ladder and find your way to a different ladder (it's not difficult). Go up the ladder you found and you will be able to go inside the fence. When you get Granite you don't have to fight him. To get outside the fence go back the way you came in.
Loads of Money
When you finish Mercury Lighthouse and get Hermes' Water, sell it and go back and get some more. Keep repeating that until you have loads of money.
Find the Wind Djinni in Vale
Once you get the lift gem and you are at least in Kalay, go back to Vale and go to Kraden's house. Go back down the stairs and there will be a rock that you must use 'lift' and there will be an opening, go through it, and run into the cave. Once you go in, you will see a circle of rocks. Jump on the first one, use reveal, and you'll see a rock in the middle that gets you to the other side. Solve a simple puzzle and open a chest before you fight this djinni. You will find the Halt Gem. Equip it, and go to the djinni. He will run away, but wait till he hides behind the rocks. Use 'halt' and fight the djinni. Be prepared for battle.
The Mysterious Sunken Ship
When you get to the top floor of the venus lighthouse !SAVE! but in a different file....(all will become clear) When you beat the fusion dragon Babi will give you the Black Orb so you can raise the sunken ship! (the one you saw earlier on in the game)
Outside Bilibin Cave, trade Flint and Forge so that Isaac knows Growth. Cast it on the small plant and climp up the vine. Within the cave, you can find an artifact called the Elven Rapier. It can be gotten before the Kolima Forest incident.
Restore HP with less PP
To start, the health points work with percents. For example, if Isaac has 400/500 health and all his Djinn are set, it would trake two herbs to heal this sucker, or Cure Well. That's a waste of perfectly good money and PP! Now if you place his 7 djinn on stand-by (assuming that they each gave him +50 HP), his max health would drop to 150. Since the max HP has dropped to 30% of its total, the current HP must do the same. Thus the final health would look like 120/150. Then you only need to use one herb or Cure! Much less PP and cash! This works for every character, though it does not nescessarily look the same. When you have properly healed them with this low HP, re-set the Djinn and their health will go back to normal.
How to get Fever(Djinni) in Imil
In Imil go up the stairs to the snowman. Once you're right in front of the snowman, use move to move the snowman to the left. It will fall off the cliff onto the ice. Go on the ice and slide your way into the cave at the north of the icy river. There you will see the djinni, Fever(Mars). You don't have to battle Fever to get him.
Beat Saturos and Menardi
All you have to do is SAVE right before you go down the shoot. Then walk around and raise your party's level. Raise their level up to at least 30 each or, if you want, more. Try not to get cursed or haunted and save because then you have to start all over again. You would have to go to a healer.
Get Water Djinni in Xian
First you have to find this one girl that is carrying water. After that, you have to talk to her when she takes one step towards the camera after it looks like she dumps it out. Then, if you did it right, there will be a puddle of water on the ground where she spilled her water. Use frost on it. Then, go up the stairs to your left and you should be able to jump on the icicle and jump over onto the land that has the djinni on it. You don't even have to fight it!
Get Gust (Wind Djinni) In Bilibin
Go up the stairs in Bilibin next to the Temple of the Great Healer. There you will be able to walk on the wooden logs that make the Bilbin border. Walk on the path of wooden logs until you get to a small area with leaves on the wall. Use Ivan's Whirlwind (psynergy) to blow the leaves out of the way. Go through the passage. There will be a statue that looks like the one in the center of the town. Move the statue out of the way and hop across the water, where you will see Gust (Jupiter).You don't have to battle him to get him.
In the mercury lighthouse there's a bunch of waterfalls. The fourth one you see can be entered and has a Mercury djinni in it. You have to fight it to retrieve it.
Easy Cash and Exp
For this you'll need the djinn Bane(Earth), Mist (Water), Scorch (Fire), and Squall (Wind). Go the the second desert that leads to Crossbone Island. Go in the twister and go to Crossbone Island. Fight the Tempest Lizard. Use the djinn Bane, Scorch, and Squall. Bane poisons it for 600 dmg a turn and the Tempest Lizard attacks twice in one turn. Scorch stuns the lizard - if that does not work, Squall will stun it - if not, Mist will sleep it. If Bane or one of the other djinn does not work, usually Scorch, Squall, or Mist works, so you set your djinn for another try.
Easy Raise to Big Summon Attacks
To easily have Judgment, Meteor, Thor, or Boreas before you battle a boss, press A and select Djinn. Go to Issac, and press R>/b> on the Djinn you want on standby. Do the same with your whole party. Then battle! On the first turn you can use these 4 attacks. All together about 3000 damage can be done.
When you get Flash and Granite, have Flash on Garet and Granite on Isaac. On your first turn use Flash or Granite, but NOT both at once. On your second turn you can switch the standby djinni to set, while the other djinni can be used. Repeat this and a barrier will protect you on every turn.
Shine a Little Light
In caves that only give you a little light by torches.
You can use "reveal" in dark caves to make 'light.'
To get into Venus lighthouse you need to firgure out which color statues go where. Here they are. Yellow: middle. Green: bottom left. Purple: bottom right. Red: top left. Blue: top right.