Kind of a spin-off topic to the 'Ever notice weird things in a ROM?' topic, thought it might be fun to post some interesting finds or unique things that go unnoticed, unused or what not!
The first thing I noticed awhile back when I was working on DBZ: Legend of the Super Saiyan SNES RPG, the English translations actually leave out some dialogue. I cannot remember which exactly, but there were a few more bits of dialogue with Kami and more with Nappa and such too! This is one of the main reasons why I want to retranslate the game is to figure out what's being said. Heck, they could even be unused dialogue lines in all honesty!
Super Mario RPG has technically enough room to support another PC. A few things have to be shifted to fully allow it, but otherwise the basic data to detect what equipment they use and even some space is allotted for it. The biggest problem there was the sprite data and such. That obviously does not exist nor is there room for it, but they do leave enough room to state which palette to use, which equipment, and I think some RAM technically as well. Makes me curious if Luigi was originally going to be apart of it.
Breath of Fire 2. I just decided to take a look at the Shamanization system in-depth a bit and it turns out that the 'Holy' shaman that gives an unused stat would have actually given a luck boost! I couldn't understand why it didn't work but it turns out that they have a separate RAM location that stores how much of a boost you get. Weirdly, it's only read when you fuse and never anywhere else.. which would explain why you'd have to refuse after you level up to get the complete stat changes. By looking at that though, it turns out that the developers completely forgot to add in a routine that updates the Luck stat which is why the boost never occurs! I'm half tempted to release a patch to remedy this but it would actually require some guides to rewrite the Shaman stats.
The system has bits to change for Offense, Defense, Vigor, Wisdom, Luck (Technically), AP and what graphic to use when the form occurs. What's more interesting is that after the PC graphic there's an unused bit that actually lets you DECREASE stats at your choosing! I looked through all the forms and this goes completely unused. I wonder if maybe they had failed forms that would decrease stats or something? Either way, it's quite handy and I'm surprised they even have it fully coded to work properly too.