- Ascended Glitch: The Ultima spell in the original version was bugged and wouldn't power up as it's supposed to. This left it doing a measly 500 damage. Director Hironobu Sakaguchi wanted it fixed, but a programmer insists on leaving the bug in, justifying it as Ultima being an outdated spell overshadowed by newer and improved ones, mirroring real life. Sakaguchi then tried to fix the problem himself, but the programmer ciphered the code's source. As such the bug remained. Fortunately Sakaguchi looks back at it more fondly these days.
- Dummied Out: The Pixel Remaster has battle sprites for Scott, despite Scott only being playable in the Souls of Rebirth campaign, which is not in the Pixel Remaster.
- Fountain of Expies:
- This game features the first Cid. Every Final Fantasy game after thisnote has a man named Cid who is usually older than the party (though he may join it temporarily or as a main member) and associated with airships. If he doesn't own, operate, or command an airship, then he's probably still an engineering genius of some sort. (The Cid who is mentioned in Final Fantasy was retconned into the backstory of the Updated Re-release.)
- Some of The Emperor's actions were later repeated by later Final Fantasy villains. For starters, his action of poisoning the water supply of the Dragoon fortress was later redone with Kefka, the latter of whom managed to take it to an even new low by poisoning a civilian kingdom (Doma), and most of Mateus' personality and traits (even his coming back from the dead) were reused with Seymour Guado. In addition his using a flying fortress capable of generating a cyclone and then being killed in it (not to mention having the title Emperor) is later repeated with Vayne in Final Fantasy XII and his use of the Sky Fortress Bahamut in the final battle before being killed, although unlike Mateus, Vayne doesn't come back from the dead.
- Name's the Same:
- Leon has the same name as another traitorous JRPG knight. Subverted in the Japanese version of both, though - as their names were Leonhart and Lion respectively.
- Princess Hilda. Enough said. Unintentional, but someone has to have laughed when they noticed. What makes it more hilarious, one is blonde, while the other is brunette, and depending on the version, dark-skinned.
- No Export for You: This originally applied to the game until the PlayStation port (The Japanese novelization of the game will most likely always fall into this category). Official reasons for the original localization ("Dark Shadow Over Palakia") being canceled were given as Final Fantasy IV being released right around the corner, and NES development was drying up in the west.
- Remade for the Export: It saw a release outside of Japan on the Final Fantasy Origins disc on the PlayStation.
- What Could Have Been:
- Moogles were to debut in this game, although as a race called the "Klion", which were meant to live in cold regions. They were scrapped and replaced with the final's beaver race, and Moogles would later debut in III.
- In the unreleased English NES prototype of the game, Gordon and Ricard were named Gilbert and Edward respectively. Leila was also referred to as "Reila," but this was likely just a translation glitch.
- The Ultimania shows design documents that hint at various different things:
- The original plotline revolved around a civil war between three brothers (with the third vying for the throne in secret) to determine the heir, a conflict which is taken advantage of by both a neighboring kingdom and a group of monsters who were previously chased out. Some of the elements such as Altair as a setting, many names, and a few character concepts such as Paul and Josef, were kept, while other elements eventually found their way into the Romancing SaGa games if they weren't discarded entirely.
- A later draft features is closer to the final game, but features more changes: The Wyvern scenario happens early on (i.e. before Salamand), Minwu was originally a pacifist and is implied to have an active aversion to using damage-dealing spells (making him more of a strict, dedicated White Mage), There is no mention of Maria and Guy being Leon and Firion's siblings and are instead said to be their friends, there were a number of scenes building on Firion's character such as Minwu warning him that "going down a path of carnage makes you like the Emperor! I see a bit of him in you!" or the rebellion accusing Firion of being a spy, Leon was to confront the party multiple times with it being revealed early on that he sided with the Empire and more. Notably, in this draft retains Aile from the previous one, making her a roaming fortuneteller and the Emperor's mother; While she was scrapped from the final game, she does appear in the novelization with the same role.
- Four music tracks were cut from the game: A shop theme, an alternate dungeon theme, an airship theme and a song called "Battle Scene 3" which is speculated to be tied to the Emperor. None of the tracks remain in the final game's data, but they were released on the All Sounds of Final Fantasy I·II. The Dungeon theme would be reused in Final Fantasy VI as The Magic House, while "Battle Scene 3" would make a surprise appearance as the Emperor's theme in Final Fantasy Brave Exvius' Series Boss Battles.
- The Wiki Rule: The Final Fantasy Wiki.
Trivia / Final Fantasy II