In Japan, Pigma Dengar's name is ピグマ・デンガー (Piguma Dengā).

His surname seems to come from the Kansai expression, デンガナマンガナー (Denganamanganā). In the Japanese version of Star Fox games, Pigma tends to speak in Kansai dialect like people from Osaka. In Japan, people from this region are characterized as rude, bad-mannered, and even criminal lowlifes, very befitting of Pigma.

It is worth pointing out, however, that this is considered an offensive stereotype of Kansai people, and they do not enjoy being characterized this way in Japanese media.

During the development of Star Fox Adventures, Nintendo considered re-releasing Star Fox 64 for GameCube, likely as a pre-order bonus similar to how The Legend of Zelda: Ocarina of Time was re-released with the first ever release of "Ura Zelda" or Master Quest as a pre-order bonus for The Legend of Zelda: The Wind Waker.

One of the more enigmatic characters in Star Fox 64 is the tanuki or raccoon dog that only appears in its training mode. On the official Japanese Star Fox 64 website, Slippy reveals that his name is ヤル・デ・ポン (Yaru De Pon), and that he is the president of Space Dynamics, the manufacturers of the Arwing and other vehicles the Star Fox team utilizes in their missions.

His surname seems to reference the du Pont family (ポン spells both "Pon" and "Pont"), a wealthy American family who made their fortune selling gunpowder, and later chemicals and motor vehicles. A popular rumor is that Henry A. du Pont secretly sold gunpowder to the Confederacy during the Civil War; fittingly enough, Slippy implies that Yaru de Pon is involved in "shady weapon deals", suggesting that he might be supplying Andross' forces as well.

Yaru de Pon is also notably the only character in the original Star Fox 64 to not have any voice acting. This was addressed in its 3DS remake, Star Fox 64 3D, where he is now properly voiced by Jay Ward (who also voices Wolf O'Donnell in Super Smash Bros. Brawl and Super Smash Bros. Ultimate, as well as the Nintendo Switch version of Starlink: Battle for Atlas) in the English version, and Kunpei Sakamoto in the Japanese version.

In Japan, Andrew Oikonny's name is アンドリュー・オイッコニー (Andoryū Oikkonī).

His surname seems to be a pun on the Japanese word for nephew, 甥っ子 (Oi-kko). Obviously this is a pun/reference to the fact that Andross is canonically Andrew's uncle.

In Japan, Slippy Toad's father, Beltino, is called ベルツィーノ(Berutsīno) which comes from ベルツノガエル (Berutsunogaeru), meaning Bert's frog or Belted frog. This is also the Japanese name for the Argentine horned frog, better known as a Pacman frog. Funny enough, after being alluded to on the Japanese Star Fox 64 website, Beltino would go on to have a major role in Star Fox: Assault, which was developed by Namco, the creators of Pac-Man.

It would seem the entire overall story of Star Fox 64, and also its reimagining, Star Fox Zero, spans about 10 years.

Going by the manuals and guidebooks, the story begins with Andross being banished to Venom by General Pepper after he unleashed a deadly weapon of some kind upon Corneria. Five years later, the original Star Fox team are sent to investigate strange happenings on Venom only for its leader, James McCloud, to be betrayed and killed by Pigma Dengar, which was also meant to be Andross' declaration of war upon Corneria and the Lylat System, and he and his new army he build up over time would spend the next five years attacking them, leading to General Pepper calling upon the new Star Fox team, which leads directly into the events of Star Fox 64.

Curiously, most of SF64's ancillary material leave it vague on how long it's been between James' death and the events of Star Fox 64, typically only saying that "several years" have passed, all except for Pigma's biography in the official Japanese Star Fox 64 guidebook, which makes it more clear that it's been five years since he betrayed James and Peppy. Beta Star Fox 64 images, as well as the lost developer dub discovered in the Nintendo Gigaleak from 2020, show that Peppy was originally meant to have a line on Titania where he says "This reminds me of 10 years ago!”, obviously referring to when Andross nearly eradicated Corneria with his bioweapon, which is what led to his banishment to Venom in the first place.

Star Fox Zero, whose story and lore is almost completely identical to Star Fox 64, fully verifies that it's been indeed five years since James' death and also overall 10 years since Andross was banished to Venom, both through its opening prologue, the Star Fox Zero - The Battle Begins animated short that was created to commemorate its release, and also the official Japanese Star Fox Zero website.

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.

According to the brochures distributed with Star Fox 64 3D in Japanese retail stores in 2011, it was Pigma Dengar who designed the Star Fox logo during his tenure with the original team, before he betrayed them.

Star Fox Adventures notably takes place eight years after the events of Star Fox 64. In an interview with Nintendo Official Magazine in 2002, Takaya Imamura admitted that he felt it'd be better for Fox and his friends to grow and change over time, as opposed to other Nintendo characters like Mario and Bowser who never age.

Imamura would touch upon this again in an 2002 Nintendo Dream interview regarding Star Fox Adventures. In addition to wanting to come up with a justification for why Fox, Falco, Peppy and Slippy would reunite to fight the enemy, he also wanted to reflect the change in genre from SF64 to SFA and how the relationships between the characters had evolved since then.

As mentioned in the same interview, Imamura had already stated some years prior he'd like to make a sequel to Star Fox 64 taking place 20 years later (Fox would be 38 years old) in the official Japanese guidebook for Star Fox 64 released in 1997.

The developers of the game were originally going to have Fox say "I guess it's your turn to be thankful" to make him sound cooler, but felt that the line was too showy for him. They instead gave the phrase to Falco, who says it after saving Fox from an enemy.

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".

According to Takaya Imamura in a 2011 Nintendo Dream magazine interview, Fox McCloud's mother is actually still alive and well on their home planet of Papetoon. This is in contrast with the 1994 Nintendo Power comic series, where it was revealed that Fox's mother (named "Vixy Reinard") was accidentally killed by a car bomb planted by Andross that was intended for her husband ("James" as he would referred to in the games starting with Star Fox 64).

According to Imamura, Fox's mother disapproved of her son following in her husband's footsteps and potentially getting himself killed the same way, and thus they have become estranged from each other, though they haven't exactly broken off from each other completely. Imamura even hints that she's secretly supporting her son's actions from behind the scenes.