All Working Grandia Extreme Cheats - Playstation 2

In-game reset
Hold [L1] + [L2] + [R1] + [R2] and press [Start] + [Select] during game play.

Bonus adventure
Successfully complete the game and save when prompted. Reload the saved game to access a new dungeon with 100 floors.

Extra Bosses
After gaining access to the Starlight Park, return to the various ruins and proceed to the end of each. You will find a Boss or group of Bosses to defeat. It is recommended that you be at level 30 or higher.

Mana Eggs
When you arrive at the second Geo Gate in the Aqua Ruins, take it to Locca. When you arrive there, take it back to Tsunami Trough - Ocean Cave. When you arrive there, go to your right and walk all the way to the end. There should be a huge oyster here. Cut it open by pressing [Circle] when you are next to it. It always contains expensive items you can either sell or use, and Mana eggs are almost always found here. The Aqua Egg is found more often, but the occasional Wind Egg or Stone Egg will also appear.

Use the following trick to get a Mana Egg in under two minutes. Upon reaching Light Ruins late in the game, go through until Light Ruins level 2. Enter the Chasm level 2, then back out into Light Ruins level 2 again. Walk in a straight line (avoid the first elevator, where you came from) all the way to the other end to board the elevator up to a secret chamber, where a Mana Egg is sure to appear. Go back to entrance of Chasm to reset the Mana Egg generation. The entire back and forth trip takes just under one and a half minutes. Repeat this as desired.

Mana Egg symbols
When junctioning Mana Eggs, small letters may appear. Some of their meanings are as follows:

R: Adds to range of spells.
MP: The MP cost of the spell decreases.
P: The strength of the spell itself increases.
H: Spells with multiple hits will hit additional times.
W: Spells with an area/fan/around effect will have a wider range.
S: The time it takes to charge the spell will decrease.
IP: The spell will deal more IP damage.

Glitch: Mystery legs
Immediately when you start playing In the first Barrack, go in one of the rooms on the second floor with a table. There are a pair of legs under the table, even though there is no one there.