Super Mario 3D World continues the brand new tradition of tacking "3D" on to the title of a completely unrelated Mario title. A Nintendo Switch version, called Super Mario 3D World + Bowser's Fury, will release in 2021.

Removed Test Stages

HeapSizeDefine.byml

Located in /SystemData/MemorySystem.szs is a file named HeapSizeDefine.byml that defines heap sizes for levels. However, this does not apply to every single level, as there are 40 unused test stage strings located in this file. Many of the level names have staff names in them.

TestHiratake024Stage

TestIshioka02Stage

TestHiratake055Stage

TestShirai27Stage

TestYamaguchiDoubleMarioStage - "DoubleMario" refers to the Double Cherry.

TestYamaguchiDokanStage - "Dokan" refers to the Warp Pipe.

TestYamaguchiFireBallStage

TestYamaguchiItemStage

TestHosaka03Stage

TestHosaka07Stage

HosakaChikachikaAZone - "Chikachika" refers to the Beat Block.

HosakaChikachikaBZone

TestHosaka22Stage

TestIwasaYokoScroll01Stage - "Yoko" means horizontal, so "YokoScroll" might refer to 2D or auto-scroll sections.

TestHishinuma05Stage

TestShiraiUraJumpFlip - "Ura" can mean "Another" and "JumpFlip" refers to the Flip-Swap platforms.

TestIwasaSpotLight00Stage

TestMurataTuccondorStage - "Tucconder" refers to the Conkdor.

TestMusaShisakuDaysStage00 - It is unknown what "ShisakuDays" refers to.

TestHosaka14Stage

TestAndo01Stage

TestHiratake023Stage

TestHiratake039Stage

TestSato060bStage

TestSato060cStage

TestSato060dStage

TestHosaka11Stage

TestTanakaW00Stage

TestHishinuma463Stage

TestSato050Stage

TestSato070Stage

TestHiratake110Stage

TestMiyama11Stage

TestMiyamaStartEvent - "StartEvent"s are camera movements or sound effects that are played at the begining of a level, e.g. the camera intro in World 1-1 - Super Bell Hill.

TestIwasaArrangeBossParade02Stage - "ArrangeBossParade" is World Flower-12 - Boss Blitz.

TestMCLPlayerStage - "MCL" might stand for Mox Co., Ltd., one of the companies listed in the staff roll.

TestUchidaBunretsuStage03 - "BossBunretsu" and "Bunretsu" refer to Motley Bossblob.

TestUchidaBunretsuStage04

TestBossBunretsuStage

RPX file

The executable file, RedCarpet.rpx, also refers to a removed stage. The string exists beside the internal names of some used levels.

TestAndo07Stage

RouteDokanTourStage - World 6-1 - Clear Pipe Cruise.

KinopioBrigadeTentenStage - Captain Toad Goes Forth.

DownRiverStage - World 1-4 - Plessie's Plunging Falls.

Unused Music Tracks

Mario 'House' Music

Mario3House02.sg.32.dspadpcm.bfstm

This track's internal name is STM_BGM_TEST_BEATSYNC, suggesting it was for testing involving Beat Blocks. It's not referring to the "House" style of music, but maybe it refers to Toad Houses or Mystery Houses. The "02" in the filename suggests the stream was revised or had an alternate version(s) at some point.

World 2 Theme Duplicate

Redc_bgm_Map02.my.32.dspadpcm.bfstm

A standalone version of the World 2 theme. The game uses the copy stored in the second track of STM_RC_BGM_MAP01.bfstm. In the USA kiosk demo, it is no longer present.

(Source: Original TCRF research )

Super Star Duplicate

00Redc_bgm_test.dspadpcm.bfstm

A copy of the Super Star theme can be found in the music folder, which was presumably used as a test track. Super Mario 3D Land also has a duplicate copy of its Super Star theme.

Unused Portion of Banner Jingle

On recent versions of the Wii U system software, the Wii U Menu banner jingle only plays for about 8 seconds before the game starts automatically. Players can hear the whole thing by removing the disc while the banner is displayed. The full track can also be heard on the soundtrack CD.

Unused Object Settings

Switchboard Rails

Similar to in Super Mario 3D Land, the BlockRail objects used for the Switchboard platforms have two unused values for its color setting (RailColor). Red appears to be the default color of the models themselves, despite grey being the default parameter.

Red (1) Blue (2)

Grey (-1/0) is used as "0".

(Source: Original TCRF research )

Unused Behaviours

Palm Trees can be destroyed by Mega Mario.

can be destroyed by Mega Mario. Roulette Blocks can be destroyed by Mega Mario.

can be destroyed by Mega Mario. Pipes sometimes have their parameter set to be non-destroyable by Mega Mario, but these pipes are never used near Mega Mushrooms.

(Source: Original TCRF research )

Unused Graphics

Textures

ShadowTex can be found in various ObjectData texture archives. The text translates to "kage", which means "shadow".

(Source: Original TCRF research )

Icons

An icon for an orange-colored Mario and a corresponding orange S logo, stored with the player icons. Their purpose is unknown, but could have been used for a "Super Guide" function, as featured in other Mario games such as New Super Mario Bros. U.

A hand icon, also stored with the player icons. Presumably, this was intended for a fifth player to control the "hand" (the one that can collect coins, hold enemies, etc.) separately with the GamePad, similar to New Super Mario Bros. U.

Internal Project Name

Super Mario 3D World's executable is internally referenced as RedCarpet. There is no other context to explain the rather... obscure project name, other than the prior game having an internal name of RedPepper. Other files in the game do refer to the project name, primarily abbreviated. The internal name is also reflected in the game's two-letter code "RD".

(Source: Catley, ItsEasyActually)

Filename Oddity

The castle music files are called *Castle01*, but there are no 00s or 02s.