A lot of error messages, sometimes vulgar, others hilarious, can be found in the PS2 version's data, including:

"Pad disconnected sometime in past...
duh? The fooking camera has fooked off!
Bad media type or no disk - PTOOIE!...
DVD drive is smoking crack!
Wot the hell? safety camera deleted!!!!"

The soundtrack became the first in video gaming history to become certified Platinum by the Recording Industry Association of America (RIAA), selling over 1,300,000 copies worldwide.

The design for Kula Diamond was aided by the input of the female staff to properly depict a 14-year-old girl with "appropriately girlish" gestures.

The second page of the The Strand newspaper, issue December 2nd, 1894, has a drawing of Inspector Jacques Clouseau from the Pink Panther series. Specifically, the image is taken from the theatrical poster for the 1982 film Trail of the Pink Panther.

In the scene of Sherlock and Watson on the train departing from Switzerland, a young boy named Hercule approaches Sherlock to help solve his puzzle box and the boy's mother appearing named Madame Poirot. This is a reference to the fictional detective Hercule Poirot by author Agatha Christie, alluding to the young boy being the character.

On the left hand of the NPC Champagne, a tattoo can be seen of the logo for Frogwares, the game's developer.

The game meant to introduce Whip into the Ikari Team. However, due to Leona's introduction in the same team, the developers waited until The King of Fighters '99 to add her to the cast.

It is possible to pull up both Link's and Spawn's character profiles in the PlayStation 2 version of the game via mods or hacking, despite neither character appearing in this version of the game.

K′ and Maxima are directly inspired by Cool and Harry Ness from the unfinished arcade game, The Fallen Angels. The designer for the Fallen Angel characters, Shin'ichi Morioka, migrated to SNK shortly after the game's failed release and used elements of Cool and Harry Ness to design the KOF duo.

According to Masahiro Sakurai, in an interview with Famitsu, the reason why Kirby (being a creation of Sakurai's) was the only one that survived Galeem's attack was because he was the only one who could plausibly escape it using his Warp Star. This also made the character accessible to starters or newcomers to the game, as a result of his speed and attacks.

Though difficult, it is possible to defeat Urizen boss fight during the prologue. Doing so will unlock a secret text ending which states that Nero saved the world and that a new legend was born.

Ash is a mini boss that can only be encountered in Japanese versions of the game. He's a homosexual who's very stereotypical in both appearance and behavior. He prances around the stage, lets out a feminine laugh when he grabs the player and uses the female voice cry when defeated in battle. He can be unlocked as a playable character by pressing and holding the B button when he is defeated. He is the strongest out of all the characters and attacks fast.

Ash was removed from the North American and European versions of the game likely because of the obvious backlash SEGA would've received. His boss theme can still be heard but only in the BGM test screen.

According to Sean Velasco and David D'Angelo, as of November 2019, the Nintendo Switch port of Shovel Knight accounts for 25% of sales of the game, despite being released several years later.

According to an issue of Neo Geo Freak, Mai's bust was modeled on Fumie Hosokawa and her buttocks on Ai Iijima; both women were famous idols at the time.

Unused code in the files of the GameCube version contains eight different weapons that were considered or almost finished including a Claymore, a Torpedo Launcher, and a Mustang Viper.

In order to decide who would become the members of the '97 Special Team, three polls were conducted by the video game journals Famitsu, Gamest, and Neo Geo Freak, in which readers voted who was the Fatal Fury characters they wanted to see in the team.
• Neo Geo Freak's winner was Billy Kane
• Famitsu's winner was Ryuji Yamazaki
• Gamest's winner was Blue Mary, barely beating Duck King via a few mere votes.

Orochi Iori was originally meant to be the final boss of the game after the player beats the New Faces Team in their Orochi forms. However, it was later decided to make Orochi Iori the mid-boss with Orochi becoming the final boss and the New Faces Team as the sub-bosses.

Shermie was based on the character Fujiko Mine from the manga/anime series Lupin the Third.

In the initial stages of development, Chizuru was referred to as the "Bell Girl", though she was soon nicknamed "Yuna", before finally receiving the more appropriate name that she has now.

Rugal was originally going have the ability to copy any move that he saw. However, the game didn’t have enough memory to execute the idea well enough, so the team settled on giving him Geese Howard's Reppuken and Wolfgang Krauser's Kaiser Wave attacks.