Octoman from the F-Zero series appears as one of the bosses in the game and a member of the Anglar Empire. His design is more reminiscent of his appearance in F-Zero: GP Legend.

Two of the game's endings make references to the F-Zero series. In the first ending, "Goodbye Fox", Falco Lombardi can be seen wearing a pair of boots that belong to F-Zero's Captain Falcon. In another ending, Fox and Falco are seen entering the "G-Zero Grand Prix", a mock up of the F-Zero Grand Prix. What's more, the two convert their fighter ships into racing vehicles, as did a character in the F-Zero games known as James McCloud, himself a tribute to James McCloud of the Star Fox games.

One of Star Fox Command's most infamous endings see Krystal ousted from the Lylat System and becoming a bounty hunter named "Kursed" in another galaxy. Looking at the Japanese script however, reveals a slightly different story:


A direct translation of this into English would be:


It shows that Krystal instead renames herself to クラゾア (Kurazoa), which translates to Krazoa.

This is clearly a reference to the ancient tribe that once ruled Dinosaur Planet in Star Fox Adventures, similar to how her spacecraft is shaped and named after the CloudRunner tribe from that game.

According to Takaya Imamura in a 2011 Nintendo Dream magazine interview, frogs in the Lylat System are born as tadpoles and remain as such until they're a month old. He even explains that Slippy and Amanda's baby seen in the "Slippy's Resolve" ending in Star Fox Command was one month old already, hence why it appears as a frog. Imamura would later illustrate this fact in comic form to commemorate the release of Star Fox Zero.

According to Takaya Imamura in a 2011 Nintendo Dream magazine interview, planet Papetoon, the homeworld of Fox McCloud as well as his father James and also Peppy Hare, actually exists outside of the Lylat System, approximately 10,000 light years away from it and Corneria. Imamura even states that the characters have to use warps to come and go.

This was alluded to in "The Curse of Pigma" ending in Star Fox Command, where Falco says:


For comparison's sake, in the Japanese script, he says:

On the Japanese website for Star Fox 64, Slippy mentions certain background characters who would appear in future installments:

• Peppy's wife, Vivian Hare. According to Slippy, Peppy took her to planet Zoness for their honeymoon, which explains why Peppy is so distraught at its polluted status in SF64. Vivian would appear in-game for the first time in Star Fox Command, where it's revealed that she and Peppy had a daughter named Lucy, and that Vivian had died of a disease several years prior.

• Slippy's father, Beltino Toad. According to Slippy, Beltino works as an engineer for Space Dynamics, the manufacturer of the Arwing and many of the other vehicles the Star Fox team utilize. Beltino would later appear in-game for the first time in Star Fox Assault, and would later appear in Star Fox Command.

It's worth pointing that unlike Vivian, Beltino was mentioned in western ancillary SF64 material, that being both the official western Star Fox 64 website and the Star Fox 64 Official Player's Guide, where it states that he helped his son Slippy create the Blue Marine.

Takaya Imamura, who was in charge of Star Fox Command's characters and storyline, originally wanted to do a single linear narrative similar to the campaign in Star Fox Assault. Dylan Cuthbert, the game's director (and previously the programmer for the SNES Star Fox games), convinced him to turn it into a branching storyline with multiple different pathways and endings. According to Cuthbert, this approach was inspired by old 'Choose Your Own Adventure' books, such as the "Fighting Fantasy" series.

Katt Monroe, a female feline character who first appeared in Star Fox 64, had undergone a notable change in appearance from that game going into Star Fox Command, most notably now having black fur instead of pink. According to Takaya Imamura in a 2011 Nintendo Dream magazine interview, he changed her appearance to be more "fashionable".

Prior to Star Fox Zero, there were two attempts in previous installments to revitalize the concept of the Walker from Star Fox 2, or at least the idea of the Arwing transforming into a robot form, those specifically being Star Fox 64 and Star Fox Command, games that both aimed at preserving ideas from the then-long-lost Star Fox 2.

• For Star Fox 64, according to Shigeru Miyamoto in an interview at the end of the Star Fox 64 Official Player's Guide, he wanted to have the Arwing transform into "a human-type craft". This was rejected by other staff members of the SF64 development team. In response, Miyamoto told his team to come up with better ideas, and from there they created the Landmaster and Blue Marine for additional vehicles.

• For Star Fox Command, according to Takaya Imamura in an interview in 2007, the dev team experimented with having the Arwing and other spacecraft transform into robots, but this was ultimately dropped.

Star Fox Adventures primarily takes place on a planet filled with dinosaurs known simply as "Dinosaur Planet". It would return or be referenced in future games like Star Fox Assault and Star Fox Command, as well as "Star Fox Zero - The Battle Begins", a promotional anime released to commemorate the release of Star Fox Zero, but it would instead be referred to with a different name: "Sauria".

It turns out Rare had always intended Dinosaur Planet's real name to be Sauria, as leaked voice clips from the implied climax of the original Nintendo 64 Dinosaur Planet feature the Krazoa name dropping it as they begin the alignment of the "Majestic Eight" planets to wreak havoc on the universe using the power of their god, the Quan Ata Lachu. An edition of "Ask Uncle Tusk" on Rare's old website revealed Dinosaur Planet's name to be Sauria as well.

The official Japanese Star Fox 64 guidebook reveals that Andrew Oikonny was essentially forced onto the Star Wolf team purely out of nepotism on Andross' part, and that he was actively disliked by his teammates due to his poor piloting skills and also massive ego in regards to his relationship with Andross. Effectively, the only reason Wolf put up with him during the events of Star Fox 64 was due to the fact that he was using said connections to Andross to provide his team with immeasurable technological and financial backup.

A timeline of events provided in Star Fox Command's official guidebook claims that after Andross' defeat at the end of SF64, the Star Wolf team moved away from the Venom army effective immediately and in turn kicked out Andrew, who no longer had the support of his now deceased uncle, hence why at the beginning of Star Fox: Assault, he's on his own trying to rebel against Corneria using the remnants of Andross' forces.

The official Japanese Star Fox 64 guidebook reveals that Pigma Dengar, who became a subordinate of Andross, was effectively the real mastermind behind the creation of Star Wolf: he goated and manipulated Wolf into becoming its leader and also working for Andross as a means to combat the newly formed Star Fox team led by Fox McCloud, taking advantage of Wolf's supposed honorable, "magnaimous" side and also his prior rivalry with Fox's father, James McCloud. It is said that he manipulates the entire team behind the scenes in accordance to Andross' orders. It also reveals that Pigma had already been working underneath Andross during his time as a researcher at the Corneria Defense Force Scientific Research Institute. It's also revealed that both Pigma and Andross had custom engineered the Wolfens that the Star Wolf team utilize in their battles against the Star Fox team's Arwings.

In Super Smash Bros. 4, the trophies for Pigma and the Wolfen would reiterate this information, as would the official guidebook for Star Fox Command. The Star Fox 64 Official Player's Guide would similarly allude to Pigma being the root cause of Fox and Wolf's rivalry, claiming that, without his influence, perhaps they could have been friends in another timeline.

There is a target enemy in Star Fox Command known as "Bomber Bird". However, in the Japanese version of the game, it's referred to as サンダーバード (Sandābādo), which translates to "Thunderbird". This is undoubtedly a reference to the Gerry and Sylvia Anderson "supermarionation" television series "Thunderbirds" that inspired Shigeru Miyamoto to create the Star Fox series.

According to the official Japanese guidebook for Star Fox Command, the Solar Satellite boss fought on Solar was originally created by a scientist within the Anglar Army named "Genome", who reportedly developed it in secret using solar energy. This character does not appear anywhere in-game.

Star Fox Command's director and long time series collaborator Dylan Cuthbert wanted to include more traditional rail-shooter stages in this title, but Shigeru Miyamoto was adamant that the development team stick with all-range stages for the majority of the game. According to Cuthbert, this was part of Miyamoto's 'Star Fox should explore new things' initial direction on the project, as he wasn't interested in it just being a copy of the first Star Fox game on SNES, or Star Fox 64.

According to the official Japanese Star Fox Command guidebook, Slippy's home world is the water planet of Aquas.

In the Japanese version of Star Fox Adventures, some of the dinosaur tribes have different localized names from their original names. For example, the CloudRunners are referred to as the クラウド族 (Kuraudo-zoku), which translates to "Cloud Tribe". The EarthWalkers are referred to as the アソーカ族 (Asōka-zoku), which strangely seems to translates to "Ahsoka Tribe". "Ahsoka" is a name of Sanskrit origin that means "pure and hopeful".

In Star Fox: Assault's Sauria mission, Peppy curiously refers to the CloudRunner Tribe as just "the Cloud Tribe". This makes more sense when you factor in that that's what they're called in the Japanese version of Star Fox Adventures and thus was what the original script writers for Assault in Japan used as a frame of reference, and it appears that whoever was localizing the script for western audiences didn't bother to change it back to the original Rare name.

Funny enough, in Star Fox Command, Krystal pilots a spacecraft that is both shaped and named after the CloudRunners. In the Japanese version, it actually retains that name, クラウドランナー (Kuraudoran'nā), which means that Command marks the first time Rare's original CloudRunner name was utilized in the Japanese version of these games.

Contrary to popular belief, and also contrary to the Star Fox 64 Official Player's Guide, Solar is not a star, but merely a lava planet with an exposed mantle, according to both the official Japanese guidebooks for Star Fox 64 and Star Fox Command. Even the official Western Star Fox 64 website clarifies it being a planet. The Western localization of Star Fox Command would also reiterate this in-game, with one of its missions on Solar being named "The Red-Hot Planet".

In a 2011 Nintendo Dream magazine interview with the Star Fox 64 3D development staff, Takaya Imamura once again clarified that Solar is a planet, and that the star Lylat exists somewhere in the Lylat System not visible on the map screen. Apparently, the development team did consider changing Solar into being a sun for Star Fox 64 3D, but this was passed over.

Star Fox, Star Fox 64 and Star Fox Adventures are the only Star Fox titles to provide official ages for the main characters, primarily within their Japanese ancillary material. In the Original Soundtrack box released for the first game, Fox, Falco, Peppy and Slippy are said to be 25, 28, 36 and 19 respectively. Star Fox 64, being a remake of the first game, would retcon these ages and make Fox 18, Falco 19, Peppy 41 and Slippy 18.

The "Farewell Beloved Falco" midquel manga, which is set right in the middle of the eight years between Star Fox 64 and Star Fox Adventures, also gives the original Star Fox crew ages, with Fox now being 22, Slippy 22, Falco 23, and Peppy 45.

Star Fox Adventures takes place eight years after Star Fox 64, which means that Fox is now 26, Falco 27, Peppy 49 and Slippy 26. Japanese Star Fox Adventures ancillary material also reveals Krystal's age to be 19, making her distinctly the only Star Fox character outside of the original four Star Fox members to have a known age. Going by this, she would be 11 and 15 years old during the events of Star Fox 64 and Farewell Beloved Falco, respectively.

After Adventures' release, Nintendo, specifically Takaya Imamura, made a deliberate decision for future Star Fox games to not provide any official age numbers for any of the characters. However, Star Fox Assault officially is said to take place only year after the events of Star Fox Adventures, so this would make Fox 27, Falco 28, Peppy 50, Slippy 27, and Krystal 20. Similarly, according to Takaya Imamura in a 2007 interview, Star Fox Command takes place 2-3 years after Assault, which would make Fox 29-30, Falco 30-31, Peppy 52-53, Slippy 29-30, and Krystal 22-23.

Although Wolf O'Donnell has never had any age officially listed for him, Takaya Imamura implied on Twitter that he is within the same generation of Peppy and James.

In the "Star Wolf Returns!" ending of Star Fox Command, it is said that after Krystal gained a new life as a bounty hunter named "Kursed" ("Krazoa" in the Japanese version) in another galaxy, she eventually came across Fox again on a planet named "Kew", although it's said that Fox doesn't recognize her.

The Japanese name for Kew is "キュー" (Kyū), which is essentially how "Q" is written in Japanese. This makes it more clear that Kew was actually named after Q-Games, Dylan Cuthbert's company that assisted in Star Fox Command's development.