The PlayStation 2 and Nintendo Wii versions contain an interesting "conversation test" left in the data, saying:
Testing Testing ONE Two Three
This is a test
Hello Spongebob
Hello Patrick
This is a conversation test
I know
Ohhhhh
I am a little sponge
Shut up spongebob
gosh its like looking at a mirror
shut up shut up shut up
dance dance dance
boogie boogie boogie
I hate my life
Hello Spongebob
I hate my life
Testing Testing ONE Two Three
This is a test
Hello Spongebob
Hello Patrick
This is a conversation test
I know
Ohhhhh
I am a little sponge
Shut up spongebob
gosh its like looking at a mirror
shut up shut up shut up
dance dance dance
boogie boogie boogie
I hate my life
Hello Spongebob
I hate my life
The ROM for the game contains hidden credits. At the end of the credits is a very brief, but firm message about people who plan to pirate the game: Pirates leave no footprints.
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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!!!!"
"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!!!!"
Text can be found in the PC version's data which simply states "This is the ultimate key!!!"
In the prototype version of the game, Raidou is given an end card sequence, hinting that he would have been unlockable in the final version.
"After all, this is all it is."
A long time had passed since Raidou was expelled from the Mugen Tenshinryuu village. He had only hungered for power ever since. He fought all and every fighter and claimed his technique his own.
Even as he received the invitation to participate in the tournament, he felt this might sate his hunger for power.
However, it seems all was in vain.
Raidou called for thunder and disappeared into the mist...
"After all, this is all it is."
A long time had passed since Raidou was expelled from the Mugen Tenshinryuu village. He had only hungered for power ever since. He fought all and every fighter and claimed his technique his own.
Even as he received the invitation to participate in the tournament, he felt this might sate his hunger for power.
However, it seems all was in vain.
Raidou called for thunder and disappeared into the mist...
There is an unused ending that exists within the game's code. The ending includes an image and text that reads: "Mister Data, set a course for Earth, Warp Factor Seven. Engage. (heh, heh, heh...)" "Man I bet I could really pick up the babes with this thing..." "Drinking all that soda...hmmm, I'm really not looking forward to seeing what Rigelatin bathrooms look like..."
The game has several .txt files within it containing long messages from the developers. One file called Wacky.txt lists a set of facts about the game.
In the Nintendo Switch version, there is unused data. This includes text and button icons for the Wii U controller, that may suggest a Wii U version was planned at some point.
There is an unused race within the game's data called "Ghost". It has 50 health and is immune to suffocation damage. It's rumored that these were originally part of a scrapped event but they can be re-enabled by editing some of the game's files.

An unused CD graphic exists in the game's files. It is theorised that this belongs to an unused song, "Addicted To Bass", since there is a reference to it in the files.
Near the scouter entries for Android #18 in the ROM are unused scouter entries for Android #13, Android #14, Android #15 and Super Android #13 from the movie Dragon Ball Z: Super Android 13.
Unused text in the GBA version's files suggest that all of the in-game spells (except for Expelliarmus) were planned to be upgradeable.
The Gamecube version's code has unused text lyrics from Bob Gibson's song "To Morrow."
The texts states:
"If you had gone to Morrow yesterday, now don't you see
You could have gone to Morrow and returned today at three!"
The texts states:
"If you had gone to Morrow yesterday, now don't you see
You could have gone to Morrow and returned today at three!"
The Xbox 360 version has text stating "PS3 Online Data Incorrect,". This suggests that a PlayStation 3 release may have been planned at one point during development.
There is code from Battlezone II: Combat Commander, another game developed by Pandemic Studios, left in the GameCube version's files.
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There are rather vulgar error messages in the game's files that state:
"FUCK TOO MANY VERTICES
Fuck me BreakDrae
Over The Fucking Top
What The Fuck Are We Doing Here
Trying To Load Dude Stuff"
"FUCK TOO MANY VERTICES
Fuck me BreakDrae
Over The Fucking Top
What The Fuck Are We Doing Here
Trying To Load Dude Stuff"
In the DS version's files are unused texts regarding Wi-Fi, suggesting that such mode may've been planned at one point during development.
NSFW - This trivia is considered "Not Safe for Work" - Click to Reveal
Rather obscene description text about Melman, Skipper, and Marty can be found in the game's data that includes:
"Melman – we're fucked"
"longer shot of marty looking at his ass"
"melman my immune system blah blah I'm a wuss"
"skipper antarctica SUCKS"
This text is used as a means of identifying camera shots during cutscenes.
"Melman – we're fucked"
"longer shot of marty looking at his ass"
"melman my immune system blah blah I'm a wuss"
"skipper antarctica SUCKS"
This text is used as a means of identifying camera shots during cutscenes.
In the Game Boy Advance version's files, there is an unused text file that states, "No need to translate."
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