There is an extra scene that you can see in the ending, simply by waiting for about two minutes after the words ''THE END'' appear on screen.
11/20/2001
Hidden Boss
While traveling through the space station Omnitopia, you will eventually come across a console into which you must input a code to continue. Try all 27 possible codes (variations of the order of the numbers 1, 2, and 3) until a door opens above. After entering the door, you will face an interesting boss.
3/28/2002
Weird glitches
Invicibility during boss battles: When you receive the alchemy spell
"escape" from Horace, take it with you before any bossfight. Then, quickly
cast it on you and your dog. You won't be able to esacpe, but you'll be
invulnerable to any attack.
Infinite call beads: When you reach Nobilia, go to the front gate where the
two guards are at. When you are in front of the two guards, go down to the
first right corner of the fountain where a call bead can be picked up. But
keep pressing the action button really quick until you load up on 99 call
beads.
4/18/2005
Moogle cameo in Antiqua
During the gladiator battle of Antiqua, among the generic crowd members underneath a canopy there is a Moogle from the final fantasy series, as well as several other final fantasy characters, one of which resembles Terra from FF6.
4/19/2005
infinite run stamina
With any weapon that has reached level three you can exploit an infinite run glitch. Hold down the attack button until the weapon reaches its maxinum charge level , continue to hold the attack button , while also holding the run button
4/21/2006
Skip the fight with the two mechadusters.
To skip the very first boss fight againest the two mechadusters, just simply press the start button when you're watching the cutscene at the begining of the game and youll start right in Prehistoria.