- Cowboy BeBop at His Computer: US television commercials, Nintendo Power's first walkthrough article and the magazine ads for the game referred to the sword that embedded itself in Bowser's Keep as "Smithy the Sword." The sword's name is Exor, while Smithy is a completely different character. In addition, the Nintendo Power walkthrough article and the magazine ads hinted at a subplot involving Geno becoming a "real boy".
- Dummied Out: A number of enemies exist in the coding that never actually spawn in-game. Many of them have equally unused Psychopath thoughts, and a few even utilize unused attacks. The majority of them are Palette Swaps of already existing enemies. The most interesting of these is probably the Drill Bit, a red variant of the Jabit enemy that appears in Smithy's factory. This enemy technically does appear in game, but only in the overworld during a cutscene. In addition, the Machine Made version of Yaridovich has an attack called "Multiply!", where he splits into four Machine Made versions of this enemy. The real Drill Bit, however, remains unfought.
- Exiled from Continuity: The reason why Geno, Mallow, Smithy and many others aren't even namedropped in most other Mario games is because Square Enix owns the rights to the characters who debuted in this game, not Nintendo. It took 7 years for Geno to make another appearance (showing up as a cameo in the Star 'Stache Smash minigame in the GBA version of Mario & Luigi: Superstar Saga, though not in the 3DS remake), and 11 years from that for him to get referenced as a Mii Gunner costume in Super Smash Bros. for Nintendo 3DS and Wii U. Super Smash Bros. Ultimate does a bit of legwork on this, having Mallow as a spirit and Geno as a spirit, profile icon, and a Mii costume which returned in a later DLC wave.
- Late Export for You: Similarly to other Squaresoft games at the time like Final Fantasy VI and Chrono Trigger, the Super Mario RPG didn't get released in Europe on the actual SNES. It would take twelve years for a European release to hit the Virtual Console thanks to the Hanabi Festival.
- Urban Legend of Zelda: For years rumors persisted on forums, and still do, that there's a secret Action Command to time item freebies by pressing the X button at the right time. This is false: your chance of getting a freebie is a random chance, which is 26% for most items and 13% for certain other items like Red Essence and Pure Water, and is determined before you even use the item. note
- What Could Have Been:
- Character designer Kazuyuki Kurashima has shared concept art for multiple SMRPG characters and creatures, including concepts for Geno focusing on him wielding a sword rather than projectile weapons, early designs for several of the enemies, bosses, and other characters both affiliated and unaffiliated with the Smithy Gang, and concepts for Belome and Punchinello alongside some unused creatures.
- Pre-release images shown in magazines evidence a number of differences from the final product. Most of these concern changes in enemy placement or overworld structure, but a particularly interesting image◊ shows that Luigi was meant to have at least one small physical appearance during the main story, at a banquet in Nimbus Land. In the final game, Luigi is only briefly alluded to at Star Hill, where you may read his wish to be "a great plumber like [his] brother Mario". Otherwise, he only has a small cameo while leading the parade in the end credits, and hosts the manual.
- Paper Mario was originally envisioned to be Super Mario RPG 2. Nintendo had approached Square to make it, but Square ultimately passed it on, so the mantle was given to Intelligent Systems instead.
Trivia / Super Mario RPG