If you play the Super Famicom version of Tales of Phantasia on an emulator and use a translation patch, you might encounter errors. This page explains how to avoid some potential bugs.
Use the Latest Patch
When using a translation patch, be sure to find the latest version of the patch, because earlier versions may have bugs that were fixed in later versions.
Avoid Pre-Patched ROMs
Pre-patched ROMs might not be using the latest versions of the patch.
Question Mark Items
When using Rune Bottles on question-mark items in a patched ROM, a garbage item may appear in your inventory. You might be able to reduce the risk by using Rune Bottles on question-mark items right away, instead of waiting until later in the game.
However, don't use Rune Bottles on ?Weapon and ?Bow that you can sell. Just sell those question-mark items.
Avoid Save States If Possible
While save states are a very helpful feature of emulated gameplay, they also increase the risk of bugs when playing a patched game. If you use the in-game save points instead of save states, this may reduce the risk of bugs.