It's possible to unlock a hidden ghost in the snowboarding mini-game at Gold Saucer, but it's very difficult to do.

Get a satisfactory score in all of the courses and a yellow balloon will appear near the start of the mini-game that activates Time Attack. Get through the Beginner Course and then choose to retry. Now, start Time Attack and go to the Beginner Course. There'll be a silver balloon there that increases your speed when collected.

Here's the tough part: You must set a record of under 00'54''000 on the Beginner Course. If you succeed, start Time Attack mode and pause the game. Go to options and then ghost. You'll notice a new "? ? ?" option at the bottom. Select it and a running cactuar will replace the moogle. The ghost and your record can be saved on your file.

If a character's HP is 7777 at any time during battle, it will go into a frenzy of super-accelerated, uncontrollable attacks, each hitting for 7777 damage to a random enemy. If a character has 7777 HP at the end of the battle, its HP will be reduced to 1 when you return to the field.

You need the Morph materia and a character's ultimate weapon(optional but makes it easier when morphing) for this to work. Go to the Gongaga Reactor(the ruined one) and go to the reactor itself in the place and just walk around until you get into a battle, you should fight a Heavy Tank(the triceratops tank,if i'm right it's a 100% encounter rate) and use morph and it'll turn to a power source. You can keep morphing these guys into power sources and easily max a character's strength out.

To get reno's red sub you must fail the attack on the red sub(Don't crash it). When you can go back to junon, go to the submarine dock and once there talk to the dog blocking the door and it will move leaving you to go through. Now the sub will be there and you can take it. However you will miss one huge materia this way

If you try to get back into Midgar you will see a man standing by the door who will say that he lost the key on a tour of bone village. Go to bone village and order a search by the tent at the top of the village. This may take a couple of trys but when you get it you enter sector 5 by Aeris's church and you can go to sector 6 as well.

To get this cool summon spell you will need to breed a gold chocobo and go to a island that is not on the map but if in the top right corner. In the cave on the island you will find the ultimate summon spell that does 70,000+ damage when used once!

Cactuar island is an island so small it wont show up on the radar and this is the only place you can run into cactuars.

First off you need the airship. When you have the airship go fly above cosmo canyon. Then go strait south. It will be hard to miss.

In the downed plane where you find Heavens cloud, every enemy morphs into some sort of source! A really easy way to do this is to get Yuffie doing good damage (5000 and up?) and have her morph them, as her weapon dosn't lower the damage of morph. Another great thing to do is to combine the mega all materia to get all the enemies at once. Even one hour of this will show great results!

This is no doubt the most difficult enemy-skill to obtain. First you must have the enemy-skill "level 4 suicide" which can be learned from the "Mu" enemies, and you must have 3 mimett greens. Now equip the "chocobo lure" and "sense" materia and find a chocobo around the chocobo ranch area on the chocobo footprints, once you find one, use the sense command on the chocobo to see if its level 16 (since "level 4 suicide" only affects targets whose level is a multiple of 4.) If it is level 16, feed the chocobo your three mimett greens and cast level 4 suicide on the stuffed bird, the chocobo will counter with "chocobuckle", hitting the one who casted "level 4 suicide". Finally, chocobuckle is yours.

You can get unlimited elixirs.
In the ice field there's a cave with an elixir in it. Grab it but DON'T push the X-button to let the text disappear that says that you've got an elixir. Normally you can't do anything when that message is on screen but this place is an exception; here you can walk out the cave and re-enter and get it again and again...
Note that if you let the text disappear the item will be removed from the screen and you can't get it again.

Want to get out from North Crater but don't know how? Well, there's a way.
If you remember, there's a hole near the cliff where you slided down the Crater. Go there. If you don't know where it is, its entrance is near where you first stepped your foot on North Crater.
Now, there's a rock that shaped like a ladder that leads to the upper side of the crater on the right side of the hole. Although there is no green triangle (sign of a ladder), that is actually a ladder that lets you go up.
After you climb up that ladder, you can board the Highwind again and get out from North Crater.

You have to have the W-Item Materia for this to work. Equip it, and select the first item and use it. Then select your second item, do not use it, just place the cursor on someone. Then Press the cancel button, select the item again and press cancel. Keep repeating this and the first item you used will keep increasing by one.

When you enter a random battle, and you find yourself attacked from behind, hold down R1+L1 to run from the battle, then let go and you are facing the enemies.

There is a way to get the materia "Quadra Magic" without having to breed a River Chocobo. You'll need the Highwind. Fly it to the most southwestern tip of land on the map and you'll notice a cave. Follow this back (Mideel way) until you get to a slightly upraised piece of land. Go as far as you can to the edge of the cliff. Face the Highwind south. Press the land button and quickly but lightly press R1. The Highwind should land half on the cliff and half off. You can now walk up to the cave and get the Quadra Magic.

After you gain acess to the Ancient Forest, there is a way to revive your characters without using a Phoenix Down. If you have a dead character, walk into one of the "fly traps" and make it swallow you. When it spits you back out, your dead character will be revived (with one HP left :P )

This glitch is exploitable after passing through Junion the first time and returning via the ship after completing the episode at Gold Saucer. Board the ship at Costa del Sol. Go to Junion and head away from the dock that the ship is at. Follow the main road to the tunnel that divides the city in two. In the tunnel there should be a number of Shinra soldiers drilling. On the left wall, there is a red box. Go up to it and press the action button. You should hear a siren going off. Walk arround and you will get into random encounters with enemies that aren't supposed to be encountered until Junion is attacked by Weapon on disc 2. You will probably need to use summons and magic contiuously during your first few battles to defeat the enemies. Don't forget to save money on potions, ethers, and pheonix downs by using the Junion Inn, which is also a good place to save.