Glitches

Get Diabolos Without Fighting the Kaiser Dragon in the Dragons Den

Normally, you need to defeat the hardest boss in the game, the "Kaiser Dragon" to be able to win the Diabolos magicite. However, You can skip the tough battle altogether and still recieve Diabolos.

Step 1:

Get to the Kaiser Dragon and stand directly in front of him without tapping A to initiate the fight.

Step 2:

Go to your menu then select "Equip", and go in to any of your characters' equip screen.

Step 3:

After checking your equipment in front of the Kaiser Dragon, exit your menu and hold forward. When you return to the game you will walk right through the Kaiser Dragon and be able to proceed without fighting him!

Now walk to the shiny light and collect your new Diabolos magicite and take the warp back outside of the dungeon. Note: This will not unlock the Soul Shrine. You must defeat Kaiser Dragon normally to unlock it.

Psycho Cyan Advance

The famous glitch from the SNES version, revisited. This time, there's a new method to trigger it.

Step 1: In battle, kill Cyan.
Step 2: Revive Cyan.
Step 3: Have Cyan use his Level 2 Bushido, "Sky," previously known as "Retort."
Step 4: Cast "Imp" on Cyan.
Step 5: Watch in awe as Cyan loses his mind and proceeds to attack continuously, uninterrupted, until every enemy is dead.

This glitch is the result of two smaller bugs involving "Imp" Status and being revived in combat; one that makes Cyan counter with physical attacks, rather than the "Sky" move, and another that makes Cyan counter any move performed by any character, not just a physical attack from the enemy to Cyan. As you can see, activating this glitch is done differently from the original SNES version of the game, but it results in the same thing: Cyan countering his own counterattack over and over again, until the battle is won.