In Star Fox 64's ancillary material, Planet Aquas is said to be an entirely water planet with its surface 100% covered by oceans. Star Fox Command however, would contradict this by showing there to be islands on Aquas in the Slippy's Resolve ending; Command's official Japanese guidebook even claims that Aquas' surface is now only 80% comprised of oceans.

In a Q&A with Takaya Imamura in 2023 on this subject, he theorized that perhaps, somewhere in-between the events of Star Fox 64 and Star Fox Command, the islands were created by underwater volcanic belts within Aquas' oceans, likening it to the emergence of Nishinoshima, a volcanic island in the Ogasawara Archipelago.

According to Takaya Imamura in a Q&A in 2024, James McCloud, Fox's father, seemingly returning from the dead to help Fox escape from the depths of Venom at the end of Star Fox 64's hard route was inspired by Obi-Wan Kenobi returning as a ghostly mentor for Luke Skywalker by the end of the 1977 film "Star Wars: Episode IV - A New Hope".

According to Imamura, whether James is actually still alive, or some kind of ghost or vision that Fox saw, is ultimately up to the players to decide. Curiously, while Star Fox Zero (whose story is mostly just a straightforward retelling of Star Fox 64) also contains a sequence at the end where an apparition of James guides Fox through Venom, it appears that Andross can also see him, even shouting:


Which further adds to the ambiguity on whether James is still alive or not.

Beta Star Fox 64 footage circa 1996 shows that Corneria was originally covered in snow. Early footage of the boss fight with the Granga robot even showed it capable of blowing snow as an attack, possibly indicating that it was responsible for Corneria's current state in this build.

Originally, the development team behind Star Fox 64 themselves actually tried to provide the voice lines for the characters:


As mentioned by Takaya Imamura above, this was met with negative reception internally and thus they switched over to using professional voice actors. What remains of this lost developer dub was recently discovered within the Nintendo gigaleak from 2020.

The official Japanese Star Fox 64 guidebook reveals that it was programmer Nobuhiro Sumiyoshi who provided the original voice for Leon Powalski, who is voiced by Shinobu Satouchi (who also voices Fox McCloud) in the final Japanese version of Star Fox 64.

Planet Zoness was originally a beautiful water planet similar to its twin planet, Aquas. It was famous for its resorts and was where Peppy Hare had taken his wife, Vivian, for their honeymoon. However, Andross' forces would invade and pollute its waters with their bioweapons, mutating the local wildlife to become larger and violent.

Early footage of Star Fox 64 circa 1996 actually show Zoness in its pure, unpolluted state, which seems to indicate that making it polluted was decided on later in development. There's actually appears to be dialogue remnants of this cleaner version in the developer's dub:


When finishing the stage:


But in the final polluted version, this exchange in the JP version goes:

The go-to term for the initial conflict of the Star Fox series, as told in three different installments (Star Fox on SNES, Star Fox 64, and Star Fox Zero), is the "Lylat Wars". This name originates from the original PAL release of Star Fox 64, where it was renamed to Lylat Wars due to trademark issues (similarly to why the first Star Fox was renamed to "Starwing" there as well). In comparison, its 3DS remake, Star Fox 64 3D, would retain the Star Fox 64 moniker in all regions. Nintendo would later actually canonize the "Lylat Wars" moniker as the official name of the conflict against Andross' forces in the opening prologue to Star Fox Zero.

In a June 1997 Nintendo Dream interview with Shigeru Miyamoto regarding Star Fox 64, when asked if he would produce a sequel, Miyamoto responded with:


Funny enough, both of these ideas would come to fruition with future titles such as Star Fox: Assault, which hugely emphasized its multiplayer battle mode, and Star Fox Command, which revisited many of the real-time strategy elements that were previously experimented with in the then-unreleased Star Fox 2.

An earlier logo for Star Fox 64 found within the 2020 Nintendo Gigaleak seems to indicate that its subtitle was, at one point, going to be "The Cosmic Crisis".

Star Fox 64's development began with a series of experiments by character designer Takaya Imamura and programmer Kazuaki Morita. As Morita was new to 3D programming, creating something entirely new was difficult, and to make matters worse, they didn't have the final N64 hardware itself to work with, instead having to utilize a bulky dev computer and a modified SNES controller. The pair decided to begin development by porting the original Star Fox, which they thought would be better for easing into 3D. As this was Morita's first attempt at learning 3D, he began with inputting his own data and placing objects like cubes on a course, and then launched basic-looking Arwings. This prototype was affectionately named "Star Box".

One of Falco Lombardi's most famous lines in Star Fox 64 is "Hey, Einstein! I'm on your side!"

This line is somewhat controversial because it implies that there exists some version of scientist Albert Einstein within the Star Fox universe. It is worth pointing out that this was added in for the Western localization of Star Fox 64, as in the Japanese version of the game, Falco simply just says:


Ultimately, the Western version of Star Fox 64 3D would have this line be changed to: "Hey, genius! I'm on your side!"

Star Fox 64's infamous Killer Bee enemies were actually designed and implemented by Shigeru Miyamoto himself. Miyamoto wanted to include them throughout development and after insisting upon it, he was told by the development team to design the enemy himself. He then drew up three different designs and asked which one the team would utilize in-game, with the final design being used near the end of development.

Many Star Fox 64 players have referred to the Venom army general piloting the mecha boss encountered in the Easy Route Corneria path as "Granga", presumably because of the Star Fox 64 Nintendo Power Official Strategy Guide referring to him as such.

In reality, or at least going by the official Japanese Star Fox 64 guidebook and also Star Fox 64 3D, the name "Granga" actually refers to the aforementioned mecha itself. Like most of Andross' lieutenants (with the exception of Caiman), the pilot himself seemingly never had a proper name.

As admitted by Mitsuhiro Takano (the original script writer for Star Fox 64) in an issue of Iwata Asks regarding Star Fox 64 3D, the development team had initially planned on including more aquatic stages based around the Blue Marine in the original game, but these were removed because they felt they dragged down the pace too much. In the Japanese version of the Aquas stage in Star Fox 64, Falco says:


English SF64's equivalent to this is "This thing will never hold together."

Apparently, this was the result of Takano feeling bad about there only being one underwater stage in all of SF64's single-player mode.

Going by files pertaining to Star Fox 64 found within the Nintendo Gigaleak, it seems one of these cut Blue Marine stages was known as カトレア (Katorea), which properly translates into Cattleya. Cattleya is a genus of orchids, which adds more credence that this was planned to be a beautiful water planet. The planet's initials (CL) show up in many other other source files, which gives clue to what it would've been like; for example, fox_edisplay references CL_SHIP0, CL_SHIP1, and fish00, whereas fox_boss.h refers to CL's boss as 鯖/saba, or "mackerel.” fox_jyuza.o meanwhile refers to a "saba snake", which heavily implies that the stage's boss would have been a giant fish creature or an eel of some kind.

Most of the other files label CL as "Colony", which implies that Cattleya would have been home to underwater cities. In beta versions of the map, CL is positioned between where Area 6 and Bolse would be, and presumably would have led into the cut planned Venom Normal route where Fox would have battled Andross on-foot with a bazooka.

In Star Fox: Assault's campaign, it is revealed by Beltino Toad, Slippy's father, that the Aparoids had already attacked the Lylat System 17 years prior, where an entire Cornerian fleet was destroyed by a single Aparoid, the same type that destroyed Oikonny's flagship and attacked the Star Fox team on Fortuna.

In a 2011 Nintendo Dream magazine interview with Takaya Imamura, he explained that rather than having the Aparoids suddenly appear, he felt that it would be better have something that was already there in the past so there would be a connection and give the story more depth. This is also why it was decided to have Beltino, who was previously stated to have worked for Space Dynamics in ancillary material for Star Fox 64, to be in charge of the Cornerian army by the time of the events of Star Fox: Assault.

Imamura explains that, with Beltino being a genius scientist, he was doing various military commissions and Space Dynamics work in the form of a commissioned employee over the years, explaining how he fought against the Aparoids as apart of the Cornerian Army 17 years priors, later joined up with Space Dynamics by the time of Star Fox 64, and then eventually returned to the Cornerian Army by the time of Star Fox: Assault.

Despite the English version of Melee using Star Fox Adventures' voice cast in the game's Corneria and Venom stages, the Japanese version uses all of the original Star Fox 64 voice actors. Shinobu Satouchi, Hisao Egawa, Kyoko Tongu and Tomohisa Aso all reprise their roles as Fox, Falco, Slippy and Peppy respectively. The former two's voice clips are also used for Fox and Falco as fighters even abroad.

Contrary to the Western version of the game, which more or less started over with a completely new and different cast, Star Fox: Assault's Japanese voice cast would actually bring back quite a few of the voice actors from Star Fox 64's Japanese dub:

• Hisao Egawa (Falco)
• Kyoko Tongu (Slippy)
• Tomohisa Aso (Peppy)
• Daisuke Gori (Pigma)
• Shinobu Satouchi (Leon)

Of the returning cast from Star Fox 64, the only characters to be recast were:

• Fox (voiced by Shinobu Satouchi in SF64, now voiced by Kenji Nojima)
• General Pepper (voiced by Daisuke Gori in SF64, now voiced by Michihiro Ikemizu)
• Wolf (voiced by Hisao Egawa in SF64, now voiced by Mahito Ōba)
• ROB 64 and Andrew (both were voiced by Daisuke Sakaguchi in SF64, now they're both voiced by Yusuke Numata)

According to Takaya Imamura in a Nintendo Dream interview regarding Star Fox Assault, Fox's new voice was meant to represent a middle ground between Steve Malpass' nasal sounding voice from Star Fox Adventures and Shinobu Satouchi's voice from Star Fox 64. Apparently, Satouchi was saddened when he discovered that he'd be returning to only reprise his role as Leon in Star Fox: Assault.

Barring the mistake with calling Fichina "Fortuna" in Star Fox 64, there is only one other main planet in all of the Star Fox series to have a slightly different English name from their original Japanese counterpart, that being Katina, which in Japan is called カタリナ, or Katarina.

In comparison, Katina directly translated into Japanese would be カティナ.

While Star Fox 64 would mark the debut of Star Wolf, the rival team of Star Fox, they were originally meant to debut in Star Fox 2, which was cancelled for twenty years before seeing an official release for the SNES Classic in 2017.

Something that's very peculiar in the final build of Star Fox 2, however, is how most of the mainstays of the Star Wolf team, such as Wolf O'Donnell, Pigma Dengar, and Leon Powalski, are present, all except for one: Andross' nephew, Andrew Oikonny. In his place is what appears to be a lemur character named "Algy", who is described by SF2's online manual as being rumoured to be "the most devious creature in the cosmos".

What makes this even more strange is the fact that Andrew actually was initially conceived for SF2, as a piece of concept art drawn by series' character designer Takaya Imamura portrays him along with Wolf, Leon and Pigma. In fact, there actually exists evidence that, by the time of Star Fox 2's gold build, Algy was still internally referred to as Andrew in the game's source code, which makes it all the more clear that Andrew was indeed planned to be in SF2 before being changed out for Algy.

It's worth pointing out, however, that despite being the main character designer for the first Star Fox, as well as future games like Star Fox 64, Imamura actually had very little to do with Star Fox 2's development, outside of the aforementioned initial Star Wolf concept art and also play-testing and advising towards the end, being only listed as under SF2's "Special Thanks" credits. Another staff member at Nintendo, named Masanao Arimoto, took over his duties as character/sprite designer for SF2. Comparing his final spritework to the original concept art, one could see that Arimoto took a lot of creative liberties with Imamura's initial designs, the latter of which look more closer to how the Star Wolf characters would look in Star Fox 64, with the most glaring example being Andrew transformed into an effectively different character.

It's pretty obvious that when Takaya Imamura returned for Star Fox 64 as its art director, Algy was reverted back into Andrew Oikonny.

In Star Fox 64 3D's ending, the conference hall where the Star Fox team meets General Pepper after Andross' defeat was changed from its original appearance into a hangar, with fewer, more spread out Dog soldiers.

More notable, however, is how the generic planet Corneria image and lettering at the back of the room has been replaced by the Cornerian Army logo that first appeared in Star Fox: Assault.

Star Fox Zero has a side mission in that can be accessed in Titania after obtaining the Landmaster's Flight upgrade. In this mission, you play as Peppy Hare, facing off against the Salvadora alone. Notably, every time Peppy performs a barrel roll, he literally shouts "barrel roll!". This is obviously a reference to his iconic line from Star Fox 64, "Do a barrel roll!" that has become an infamous internet meme over the years.

It's worth pointing out that this only occurs in the Western version of Zero, as Peppy remains silent even when barrel rolling in the Japanese version. This is because "Do a barrel roll!" never really became a meme in Japan, as Peppy has a different, less iconic line in the Japanese version of Star Fox 64 when instructing Fox how to roll: ローリングで弾くんだ!, which seems to translate to something along the lines of "use a rolling technique!".