Phantasy Star II

In battle, get all of your team members KO-ed except for Nei. Then get Nei to cast Nasak and she should KO herself. Then, your characters will turn invisible and you can walk around dungeons freely.
(This works in all version of PS2)

It is possible to have armor equipped even if it is not in your possession...first make sure you have at least two pieces of armor in a characters possession..

1. Go to the equip screen and highlight the armor you want to keep equipped.

2. This is the tricky part...equip/unequip the armor...when it says ".....takes armor" press a confirm button and then QUICKLY press down to the next armor below it and equip/unequip that armor. You need to do it
fast enough so that you see only a little change in the attack,defense, and/or agility from changing equipment.

3. You'll know if the glitch worked because you won't be able to unequip the first piece of armor. Now you can give the armor to another character! Who says you can't have powerful equipment like the NEIMET on just one character?

To cancel the glitch, simply equip another piece of armor over the affected armor slot.

It may take a few tries to get the glitch working because the equipping/unequipping must be done very quickly.

When paused, press C and one frame should go by.

When examining the nearby area with the A (Talk, Examine) button, the next step you take is guaranteed not to take you into a battle. Keep hitting the A button (Talk, Examine) while you walk, so that after every step it will say ''There seems to be nothing unusual here.'' No random encounters will happen, but it will take quite a while to maneuver through dungeons this way.