Save Anywhere Glitch
While inside the Tyrono Fortress, you should spot a few switches. One activates a save point, one starts a battle, and one makes part of the floor disappear. Activate the save point, then make the floor disappear. Go to the top of the left hole, jump off and press A just as you drop onto it. At this point you should save your game. If you did this correctly, you should be able to save anywhere, any time... that is, until you turn off the system.