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Um Jammer Lammy

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Title Screen

Um Jammer Lammy

Developers: NanaOn-Sha[1][2], SCEI[1], Nemesys[1]
Publisher: Sony Computer Entertainment[2]
Platform: PlayStation
Released in JP: March 18, 1999[2]
Released in US: August 17, 1999[3]
Released in EU: September 10, 1999

AnimationsIcon.png This game has unused animations.
AreasIcon.png This game has unused areas.
DevTextIcon.png This game has hidden development-related text.
GraphicsIcon.png This game has unused graphics.
ModelsIcon.png This game has unused models.
MusicIcon.png This game has unused music.
TextIcon.png This game has unused text.
RegionIcon.png This game has regional differences.
PiracyIcon.png This game has anti-piracy features.

DevelopmentIcon.png This game has a development article
ProtoIcon.png This game has a prototype article
PrereleaseIcon.png This game has a prerelease article

Um Jammer Lammy is the spin-off to PaRappa the Rapper, starring a shy guitarist lamb who's late for her gig.


Read about development information and materials for this game.
Development Info
Read about prototype versions of this game that have been released or dumped.
Prototype Info
Read about prerelease information and/or media for this game.
Prerelease Info
Umjammerlammy camolammy.png
Regional Differences
You can play in hell! You come far!

Unused Graphics


The button inputs left over from PaRappa the Rapper. An input sprite sheet was used for the bar instead, leaving these textures unused. The L and R buttons read "L1" and "R1" rather than just "L" and "R".

A "Lesson" graphic, as well as associated numbers, which would have likely been displayed before each verse, as is with the original PaRappa the Rapper.

Unused OFF texture, presumably used when no effectors are being used.

Unused textures for Cool Mode, implying Cool flashed in a different way when the player reached it. A similar graphic is seen in this video, albeit with the transition from Bad to Good mode and no red variant.

An unused score indicator.

Unused eye textures for Lammy. These textures are briefly used in a music video advertising Um Jammer Lammy NOW!. An official mug for sale on Whimsyload, Rodney Greenblat's website, has this specific expression referred to as "Knocked out".

Unused eye textures for Rammy, much like the latter.

An unused mouth texture for Katy Kat.

Unused expression textures for Ma-San, suggesting she was originally more expressive during development.


Only found in the US version is the high score candy bar opened from the right side.


Joe Chin in Cool Mode isn't ever shown in-game from the back.

Two fire gradients. The latter is only present in the Japanese version.


Unused Cathy Pillar textures.

An unused 8th baby with a resemblance to Rodney Greenblat's own Thunder Bunny character. It only appears on the loading screen and in the cutscene.

The back of the singing baby's head is never seen in-game, nor is it ever addressed in the VRAM.


A texture with the kanji symbol 仮 "tentative" (Temporary).

An unseen front side of the cockpit mirror.


Unused low-resolution sprites of Lammy, PaRappa, and Teriyaki Yoko respectively. They were supposedly meant to be used when the camera is far from the stage, though this doesn't happen in-game. The Lammy sprite was removed in the European version.

The bassist and backup singers in Teriyaki Yoko's band have backsides that aren't seen in-game.


While this texture is technically used on the wall right of the stage, only the middle section is drawn in-game. This also applies to S8.


A screenshot from the credits with the text "XA PLAYER" and a kanji symbol (仮) that means "temporary". XA is the filename extension for the game's music data that the PlayStation reads from. It was removed from the European version.

Unused Models



Only in the Japanese version is SET_BOT.TMD, which is a near duplicate of the stage set. The only differences are the vertex coloring and has incorrect texture mapping.



KUMO.TMD is a formation of blue clouds.

Unused Animations



ON_00.VDF is a loop of Chop Chop Master Onion dancing. While this animation goes completely unused in the PlayStation version, it was later implemented in the arcade port, Um Jammer Lammy NOW!, during the intermission after finishing the stage.


UJL MA 94 VDF.gif

MA_94.VDF is an animation of Ma-San kicking her drum and lifting her arms. It's was likely meant to be seen at the end of the stage, but she instead only lifts her arms.

Unused Stage

Upon going to the stage selection screen, it is immediately noticeable that it's not possible to play Stage 1 as PaRappa, nor it can be played on the Co-op and Versus Modes. Despite this, some data for Stage 1's PaRappa variant still remains, which can be accessed by using the following GameShark code, which applies to the North American version only:

300790B4 0003

Aside from the music tracks, the existing data is very barebones; there are little to no background animations, all inputs are mapped to Triangle, and, in COOL mode, PaRappa can only say "pick". This data, as well as of this stage's Co-op and Versus variants, would eventually be completed, and inserted in the game's arcade port, Um Jammer Lammy NOW!, released nine months later.

Stage 1 with PaRappa

Stage 1 with PaRappa on COOL Mode (Dialogue)

Failing Stage 1 with PaRappa

Unused Text


Each SNG file has placeholder text strings for the French, German, Italian, and Spanish languages which simply consist of the name of the language in question followed the number of the message, like the following:



The executable has some error messages written in broken English.

xa ready callback ng
xa ready callback ok
XA chang cancel!!
pause error!!
The others error!
Assertion failed: file "%s", line %d
NEME/prdracom.h Can't get PACKET AREA !! size[%d]
Now free size[%d]

Anti-Piracy Oddity

While all regional versions of Um Jammer Lammy contain "anti-mod" copy protection, the European version of the game uses the Japanese anti-modchip message, an issue also seen in the NA 1.0 version of Dino Crisis.

Japan/Europe North America
PSXsoftwareterminatedJP.png PSXsoftwareterminated.png