FF Mystic Quest Item Overflow Glitch

Final Fantasy Mystic Quest - Item Overflow Glitch:
This glitch can be performed with varying results, all dependent on the order/slots your items are in.
For the current Any% route this glitch is used to 1. Have an unlimited stock of seeds, and 2. Spawn items in you inventory to skip certain parts of the game. When first arriving in Fireberg, you item inventory needs to be, from left to right: Empty Slot, Potionsx3, Refreshersx3, and Heal Potionsx3. At the seed vendor, set the amount you want to buy to zero and accept. This places a seed icon in your invetory, but has a zero beneath it. Using this item will produce a stack of 99 seeds(that never reduces) as well as replacing your potions with 3 sky coins. Next, buy 19 cure potions from the vendor in the same building. This will give you a few more items in your inventory enabling you to open the fire coin door in Focus Tower.
**Note**
The item overflow glitch is used later, after Pazuzu's Tower, to spawn more necessary items. Make sure the heal potions in your inventory have been used before purchasing the 0 cure potions needed to do the glitch.