There are unused audio files which directly pertain to the Save The Dinosaurs mini-game. Among these files, there are "Try Again" audio and dinosaur death screeches.

The models who portrayed the babes in the game were uncredited. These are the following babes who's models have been confirmed:
*Lola, played by Peita Jade Breese
*Rebel, played by Victoria Ferrara
*Sparkles, played by Jakita Saint-Trelour

The magic circle Serenity steps onto at the start of levels contain the phrase "vita non est vivere sed valere vita est" which is the Latin proverb for "life is more than merely staying alive."

The runes that appear in the magic circle every time Serenity uses the Demons' Score read "Tu Fui, Ego Eris." It is Latin for "I was you; you will be me." The runes under her read "Mors Tua, Vita Mea" which is also Latin for "Your loss is my gain."

The game goes by different titles in various regions.

In the USA the game is "The Real Ghostbusters", featuring Ghostbuster characters..
In the EU it is "Garfield Labyrinth", featuring the comic strip character Garfield.
In Japan the game is "Mickey Mouse IV: Mahou no Labyrinth", featuring the cartoon character Mickey Mouse.

During the second phase of the Dantalion stage, the boss will use a potion and cast spells that reference white magic from Final Fantasy.Spoiler: Dantalion will also display the message "•The laws of the universe mean nothing!" which is a reference to the final boss of Final Fantasy V, Neo Exdeath.

Most of the cut-scenes in the game are skippable, but the opening cut-scene is a special case. If you try to skip it the first few times, Cartman will chastise you for doing so and the cutscene will continue to play. If you continue to try the skip the cutscene, Cartman will finally give in. However, it'll go straight to the closing credits instead.

Within the game's data is an hidden message that says: "Err, what you doin' here???"

In the game’s files are unused text regarding Easy Mode.

The Joy-Cons featured in the digital tutorials feature fully modeled interiors, despite these not being visible without orienting the camera to clip into the Joy-Con models.

In the game's files are unused graphics that say "Game Over" and "Continue Playing?" In the final game, losing all of the player's hearts will warp said player back to the beginning area, and Spoiler:letting the moon fall will result in a lengthy cut scene followed by the famous words, "You've met a terrible fate, haven't you?" accompanied by the Happy Mask Saleman's chuckle.

Within the game's data is an unused conversation between Seymour Skinner and Agnes Skinner. It is about an answering machine message. This is the transcript:
Seymour: "You have reached the Skinner residence. Please leave a concise message at--"
Agnes: "Seymour! What are you doing?"
Seymour: "Recording an outgoing answering machine message."
Agnes: "Without my permission? You're grounded!"
A modified version of Agnes' last line here can be heard in Level 7's ghost playgrounds, but it is hard to hear.

In the game's files is an unused audio clip of Zelda warning the player that the disk may be dirty.

Virgin Interactive made and showed off a game for the Nintendo 64 called "Freak Boy." The game was made using the same SGI systems that was used to make the Nintendo 64 possible. According to press coverage, players would've been able to modify their heroes bodies, thereby helping solve puzzles. The game was cancelled after developers were asked to remake the game from scratch 2 times.

In the game's files is an unused audio clip of Link warning the player that the disk may be dirty.

There is an unused sound of the Boo's laugh from Super Mario 64 with the file name ST_GREATBAY_TKLE_LAUGH which would've likely been used for Tingle at the Great Bay stage.

In the game's files is unused text regarding the player's stolen Hero Shield. It's suggested that the shield would've been stolen, resulting in the player going to the Curiosity Shop to get it back.

"You bought back the Hero's Shield
that was stolen from you.

In the future, watch out for
swooping birds on your travels."

In the game's files are two unused texts regarding the Hylian Loach. This may suggest that said fish would've been found in both a bottle and without one.

The first text states:
"It's a Hylian Loach in a bottle!
An illusory fish that
few have caught...

And it came in a bottle!
What a find!"

Another one states:

"You got the Hylian Loach!
An illusory fish that
few have caught..."

There's unused text regarding getting a seahorse in a bottle. In the final game, the player must have an empty bottle to get a seahorse.

"You traded for the Seahorse.
And it came in a bottle!
You should hurry and return it
to its home at Pinnacle Rock."

Inside the game's files, you can find unused text from The Wild Thornberrys 3-D Chopper Chase.