Found within the E3 2002 kiosk version of Star Fox Adventures is an unused cutscene of Fox talking with Tricky, Peppy and Slippy after placing presumably the final SpellStone. Various unused SFA voice clips sync up perfectly with this sequence, revealing the dialogue exchange to be:


This presents bit of a different story from what is presented in the final game. In the retail release, it's discovered that returning all of the SpellStones to the Force Point Temples does not single handily restore Dinosaur Planet to its original state, and that Fox also needs to return all of the Krazoa spirits to Krazoa Palace to fully stabilize the planet, in addition to freeing Krystal from Krazoa Palace.

Here, it does seem returning the SpellStones restores the planet, and collecting the Krazoa spirits is for a separate task, that being merely freeing Krystal.

Originally, going by some of the initial concept art as well as early gameplay footage for Star Fox Adventures, the tip of Krystal's staff was meant to transform whenever Fox performed one of its magic abilities. For example, when Fox performed the Ground Quake ability, it'd transform into a hammer. Curiously, one of the pieces of concept art mentions the staff transforming into a wing tip to give Fox the ability to glide, which goes unused in the final game. The models for these staff transformations were also found within the E3 2002 kiosk version of Star Fox Adventures. Ultimately, this went unused in the final game.

One of the enemies Sabre and Krystal would encounter in Dinosaur Planet were these robotic Scorpion-like automatons, typically found in Krazoa-build strongholds such as the Force Point Temples and Cape Claw. While removed in the final Star Fox Adventures, they could still be found hidden within the E3 2002 kiosk version via hacking.

Contrary to popular belief, Shigeru Miyamoto and Nintendo did not singlehandedly force Rare (who was never even fully owned by Nintendo) to convert Dinosaur Planet into Star Fox Adventures. It was merely an offer and suggestion Miyamoto gave to Rare, and at the very least, the higher ups such as the Stamper Bros. and Kevin Bayliss were on board with it. An October 2004 edition of Rare's Scribes says as such:

In an interview with Phil Tossell (the lead software engineer for Star Fox Adventures) within an issue of Retro Gamer, he admitted the development team thought the game may have never actually even been released because of the impending Microsoft buyout.

Found within the files of Star Fox Adventures is an unused audio track for the WarpStone's introduction cutscene, which also includes verbal dialogue. This was clearly an earlier version before Rare had done a voice-acting retake.

Most notably, the music that plays in the background is a remnant from Dinosaur Planet, from the scene where Krystal first arrives in SwapStone Circle and thus meets her respective SwapStone, Rubble. In the final Star Fox Adventures, music performed by bagpipes is played instead in this particular cutscene.

The Farewell Beloved Falco manga introduces a new member of FREE AS A BIRD, a blue feline character named Kool. The climax seems to imply that Kool and Katt Monroe have romantic feelings for one another, with Falco Lombardi looking on in approval.

Kool wouldn't appear again after this, and Katt would go back to following Falco in certain story routes in Star Fox Command. When asked about Kool's whereabouts by Nintendo Dream staff in 2011, Takaya Imamura responded with:

Star Fox Adventures' Japanese localization marks the first and only instance of the Star Fox team's robotic operator, ROB 64, actually being referred to as such in-game (at least through the Japanese subtitles) by his teammates (ロブ), as opposed to by his usual Japanese name, NUS (ナウス). This also occurs in Farewell Beloved Falco, the Japan-only manga prologue to Star Fox Adventures.

The life bar icons for the SnowHorn and HighTop in Star Fox Adventures sport different, more cartoony designs from their respective in-game models. The reason for this is because they're clearly based upon their original N64 Dinosaur Planet models, which too are much more cartoonier than the final SFA models that go for a more semi-realistic look.

A rendition of Star Fox 64's Area 6 theme can be listened to in Star Fox Adventures' sound test, despite it being otherwise unused in the final game. In a January 10th, 2003 edition of Rare's Scribes, composer David Wise explained that the Area 6 theme was temporarily used as the theme for the final confrontation against Andross, but was always intended to be replaced with the music that plays there now in the final game, which is a rendition of Andross' battle theme from Star Fox 64. According to Wise, this track was literally substituted in the final hours of development, and Rare did not have time to remove it from the final version.

The floating planetoid representing CloudRunner Fortress on the world map screen in Star Fox Adventures very clearly resembles its original, rockier iteration from the Nintendo 64 version of Dinosaur Planet, as opposed to its remodeled look in the final Star Fox Adventures.

While the Brain Squids that float around in Krystal's opening prologue segment at Krazoa Palace are often thought to be the only common enemies in Star Fox Adventures that she can kill (as she is otherwise stripped of her staff and imprisoned at the top of the palace for the rest of the game), it's actually possible for her to kill a SharpClaw during this segment. The player will need to grab a barrel from the hallway before the flame jet room and place it on the pressure plate in the room after the jets, letting Krystal use the barrel generator in that room for a free barrel. After grabbing that barrel, the player will need to run over to the lift, and once they're in the next hallway, they'll have to go left to the watery barrier, opposite of the Krazoa head where the player normally deposits their Krazoa spirit. From there, if the player waits long enough, a SharpClaw will patrol right by on the other side of the barrier, and from there Krystal can throw her barrel on top of him, immediately destroying him.

When Fox frees Krystal from her crystal prison at the top of Krazoa Palace in Star Fox Adventures, she immediately grabs her staff back from him and begins firing at the newly resurrected Andross as Fox runs off to his Arwing to confront the latter in Dinosaur Planet's orbit. Strangely enough, in the ending cutscene after Andross' defeat, Fox once again has Krystal's staff in his backpack. When asked about this in a January 10th, 2003 issue of Rare's scribes, the development team responded with:

In the original Dinosaur Planet, Krystal would come across a pachycephalosaurid dinosaur at CloudRunner Fortress, who is revealed to be one of the SpellStone guardians, who also gives Krystal the Illusion spellpage to bypass the SharpClaw guards within the dungeon. In-game hints and task summaries reveal him to be of the "BoneHead" tribe.

This individual would appear in the final Star Fox Adventures, with his role slightly rewritten as the chief engineer at CloudRunner Fortress (The Queen CloudRunner took over his original role as the SpellStone Gatekeeper for this area). Talking to him in a cutscene will reveal his name to be "Gradabug". While not mentioned anywhere in-game, the Star Fox Adventures Nintendo Power guidebook reaffirms him belonging to the BoneHead tribe.

There's a fairly common misconception that the character of Krystal was originally meant to be a cat in Dinosaur Planet, prior to being redesigned as a vixen when the project was transformed into Star Fox Adventures.

The reality is that despite having a somewhat feline look, Krystal was always intended to be a fox as early as Dinosaur Planet, her original backstory even claiming that she belonged to the "Vixon Tribe" on planet Animus (Sabre and Randorn on the other hand belonged to the "Wolven Tribe", as they were both wolves). Former Rare artist Kevin Bayliss has stated multiple times that she was meant to represent a stylized arctic fox in particular.

According to Takaya Imamura in a 2002 interview with Nintendo Dream, a lot of time was spent between Rare and Nintendo brainstorming on what kind of equipment and weaponry Fox should have during the transition from Dinosaur Planet to Star Fox Adventures. Imamura wanted Fox to use a gun, similar to his original EAD-created prototype of Star Fox Adventures before it was merged with Dinosaur Planet. However, this was not well suited for the Zelda-esque framework established by Dinosaur Planet, so this was abandoned and they embarked on a long period of trial-and-error to determine what weapon Fox should use.

After experimenting with ideas such as a whip, or a gun and sword combo (possibly based on how Fox was already using Sabre's sword in the leaked Dinosaur Planet build), Rare and Nintendo finally settled on Krystal's staff. Imamura claims that this was decided upon because it was a weapon that doesn't require the player to slash the enemy, as he felt uncomfortable with the idea of an animal character like Fox being able to decapitate opponents.