Feel elements:
Use a Feel element and then use a element that is opposite of the color of the Feel element to inflict more damage to an opponent. Example: Use Feel Yellow and then use a Green Element.

Summon:
The field effect in the upper right corner has to be all one color to use a summon. Example: To cast a Blue Summon like Frog, the field effect has to be solid blue.

Always win at roulette:
The following trick allows you to win the roulette game every time in the casino on the Zelbess. When the pointer begins to spin, pause game play when the red tip is in between the west and the south points of the roulette wheel. Then, repeatedly press Circle and resume the game. It will land on north every time, giving you double the money you wagered.

Duplicate items and elements:

Step 1: Successfully complete the game, but keep a file that you can complete the game from (this must not be a "Continue+" game).

Step 2: Save your progress from completing the game to a separate file and "Continue+" the file near the end.

Step 3: Complete the game with the "Continue+" file, but make absolutely certain you still have the file near the end.

Step 4: Save the "Continue+" data over the old data that let you restart your game and repeat steps 2 to 4 as needed. If done correctly, you will have twice the amount of everything in your inventory, including your elements, weapons, (basically everything except your key items).

This is a very good trick for making rainbow weapons and armor near the end. Since you can keep repeating this you can, if you have the time, end up with 99 of every item/element in the game.

Unlimited money, Dragoon's Glory's, Viper's LvL 7 Tech Skill:
After Serge is reborn, visit Termina (Home World) with Viper in your party. Talk to the barmaid, go into the back room, and examine the flag on the back wall. Viper will talk briefly about the flag and then take his LvL 7 Tech Skill, "FlagBearer". He will also take a Dragoon's Glory. Exit the room and re-enter. Examine the back wall with Viper still in your party. Even though there is no flag, Viper will say the same thing that he said before and will take another "FlagBearer" and Dragoon's Glory. Repeat this as many times as needed. Each Dragoon's Glory can be sold for 4,000 gold. The stats for Dragoons's Glory is Atk. +3, Hit% +3%, Mgc. +2. You can also disassemble them for 1 Denadorite, 2 Scale, 2 Fur, and 2 Fang.

Getting Mojo:
In the "Home World", get the shark tooth from the fisherman. Then, in "Present World", show the shark tooth to the scarecrow (Mojo) and he will join you.

Getting Guile:
In Termina, talk to the statue polishing man, then go to Korcha (boat man), Talk to him and he will tell you get a person to help you to get to Viper Manor. Go to the bar and Guile will be the man next to the locked door. Ask him, or you can get Pierre or Nikki.

Getting Kid:
After you talk to Lenna, go to Cape Howl. When you are leaving, Karsh will walk up to you and Kid will appear,

Getting Glenn and Macha:
Say "No" to save Kid when she is poisoned and get Glenn and Macha (Korcha mother). Glenn and Serge have an attack together called "X strike".

Getting Lenna:
Say "No" after Cape Howl when Kid asks to join you. Go back and ask.

Give Bellflower to Glenn:
Go to the moutntain after Cape Howl and walk around where there is a brown monster. Avoid it and walk to the purple flowers. Get them, and when you get to Termina, go to where Glenn's brother and father are buried. He will be there with General Viper's daughter. He will walk up and ask you give them for free.

 Hydra Humour for Kid:
Press Start on the world map and change to "Home World" from Opassa Beach. Go to Hydra Swamp (dwarves place) to find a Hydra Humour.