
Through the use of Action Replay codes, it's possible to die on the Level Select map. When this happens, Pac-Man will respawn on the game's title screen; moving around will reveal a stool and fishing rod off-screen, suggesting that he was originally planned to fish on the title screen instead of just standing and playing idle animations.

Before the save point in the Forgotten Region of the Human World, there are multiple locked cells which can be opened with the Brass Key. Near the save point is an empty cell that appears to have nothing of note inside. However, if the player positions the camera correctly a hanging corpse can be seen hanging out of bounds through the wall. In a Japanese trailer for the game, a similar location can be seen with a corpse hanging inside a cell which gets unlocked so it's likely that the corpse was moved out of bounds in the final version to avoid players seeing this scenery.

In 2021, the game's debug menu was discovered on a demo disc and was later executed in the retail version through the creation of a GameShark code. The menu contains four options featuring the surnames of four of the game's programmers (most likely to test out certain aspects of the game each one focused on more easily): Satoshi Kishiwada, Yasuhiro Yamamoto, Tamotsu Goto, and Naoto Uenaka.
Additionally, by selecting "Area 7 Action" and "Scene 06 - Last-Scene", you can access a beta version of the crumbling Soda Fountain, the final area of the game Spoiler:where Musashi battles against Dark Lumina, lacking textures and featuring an overhead camera compared to the sidescrolling camera in the final game.
Additionally, by selecting "Area 7 Action" and "Scene 06 - Last-Scene", you can access a beta version of the crumbling Soda Fountain, the final area of the game Spoiler:where Musashi battles against Dark Lumina, lacking textures and featuring an overhead camera compared to the sidescrolling camera in the final game.

Contrary to the official explanation about Kirby's lack of a Keyblade after inhaling Sora, there is an unused Keyblade model for Kirby, meaning that at some point in the development of the final DLC Fighter, Kirby would have indeed wielded Sora's Kingdom Key during the use of Sora's Neutral Special, but this idea was scrapped. The weapon can be found in the game's data but remains functionally unfinished, and even when the game is modded the Keyblade will not spawn in.
In numerous official video game demo compilation discs (such as the fondly regarded Pizza Hut demo disk that came about as a promotional stunt co-jointed by Sony Computer Entertainment America and Pizza Hut), there was a "late demo" of Crash Bandicoot 3: Warped included, featuring a playable beta version of the level "Under Pressure".
As this version of the stage came from an earlier build of the game, there are distinguished differences between this version and the final version. Two differences that stand out between versions is that the signature pufferfish is purple instead of its usual orange, and that the Time Trial record times differ in such a manner that the demo version appeared to be deemed too difficult shortly before the final build's completion and retail release.
In the demo:
•Sapphire Relic Time: 1:28:33
•Gold Relic Time: 1:04:93
•Platinum Relic Time: 0:58:73
In the final release version:
•Sapphire Relic Time: 1:46:00
•Gold Relic Time: 1:17:90
•Platinum Relic Time: 1:10:50
As this version of the stage came from an earlier build of the game, there are distinguished differences between this version and the final version. Two differences that stand out between versions is that the signature pufferfish is purple instead of its usual orange, and that the Time Trial record times differ in such a manner that the demo version appeared to be deemed too difficult shortly before the final build's completion and retail release.
In the demo:
•Sapphire Relic Time: 1:28:33
•Gold Relic Time: 1:04:93
•Platinum Relic Time: 0:58:73
In the final release version:
•Sapphire Relic Time: 1:46:00
•Gold Relic Time: 1:17:90
•Platinum Relic Time: 1:10:50

In an early unused version of the "Mountain of Rubble" cutscene, Fiona is voiced by a different voice actress, but she is completely silent in the final version. In addition, there's a unique music in the cutscene that was removed in the final version, and the dirt effects when Fiona falls back down were originally brown instead of grey.
The opening scene in the interrogation room was originally supposed to be darker. In the released version, the police detectives only gave Joker a couple of shots of a sleeping drug and beat him up. An unused cutscene found in Persona 5 Royal shows a tray of some kind which implies that the police detectives brutally tortured him.

If the player installs external NES ROMs onto the Controller Pak and selects the "Save a Letter" option at the Post Office, the game will bring up a unique menu for viewing and deleting the ROMs. Because Nintendo never officially implemented a means of installing NES ROMs onto the Controller Pak, this menu goes unused in normal gameplay. The menu is also absent from Animal Crossing and Dobutsu no Mori e+, due to the player being able to delete the ROMs directly from the GameCube's main menu.
Additionally, in the iQue version, the menu's text is corrupted, with the title appearing as garbled characters and the rest of the menu being in Japanese.
Additionally, in the iQue version, the menu's text is corrupted, with the title appearing as garbled characters and the rest of the menu being in Japanese.

Within the data of the PlayStation version of this game is an unused track which was supposed to be a bonus race track which was dropped because of time constraints. This track is in a very unfinished state with no texturing present.
NSFW - This trivia is considered "Not Safe for Work" - Click to Reveal
On April 23rd, 2015, an update was released that altered some frames of animation for Filia, Fukua, and Cerebella. This was done with the purpose of removing or heavily obscuring some panty shots, as the developers considered them to be unnecesary fanservice.
Additionally, two unused animations for Filia were also removed from the Digital Art Compendium. These animations include a time over animation where Samson tears apart the top of her shirt while she tries to cover herself up, and a taunt where Samson spanks Filia hard enough to make her fly a short distance and land on her knees.
Additionally, two unused animations for Filia were also removed from the Digital Art Compendium. These animations include a time over animation where Samson tears apart the top of her shirt while she tries to cover herself up, and a taunt where Samson spanks Filia hard enough to make her fly a short distance and land on her knees.
There are unused character select animations within the game's code. These animations would play whenever a character is selected by the player. Because this feature was removed early in development, only the base roster has this feature.

The final boss, the helicopter Warhawk, has an unused character select portrait in the game files, clearly indicating that it was a considered addition during development. The nature of the vehicular game design was likely too incompatible with a flight-based character.
Interestingly, as with all characters in the game, the vehicle name is separate from the driver of said vehicle. While the helicopter is only known as Warhawk, the pilot is referred to as Black Razer, while in the final game, nothing is known about the identity of Warhawk's pilot.
Interestingly, as with all characters in the game, the vehicle name is separate from the driver of said vehicle. While the helicopter is only known as Warhawk, the pilot is referred to as Black Razer, while in the final game, nothing is known about the identity of Warhawk's pilot.
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