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Catz (Game Boy Advance)

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Title Screen


Also known as: Nakayoshi Pet Advance Series 3: Kawaii Koneko (JP)
Developer: MTO
Publishers: MTO (JP), Ubisoft (US/EU)
Platform: Game Boy Advance
Released in JP: August 9, 2002
Released in US: March 28, 2006
Released in EU: March 31, 2006

GraphicsIcon.png This game has unused graphics.
TextIcon.png This game has unused text.
SoundtestIcon.png This game has a hidden sound test.
RegionIcon.png This game has regional differences.

Elementary, my dear Cactus.
This needs some investigation.
Discuss ideas and findings on the talk page.
Specifically: Is there a debug menu accessible in the game?

Catz is one of the many games in Ubisoft's Petz series. This one in particular is known for the title screen music featuring a symphony of meowing cats.

Unused Speaking Frames

All of the characters in the game have frames of each of them speaking. However, in the actual game, it only shows a still portrait of their face, meaning these frames go unused.

Mom Dad Komugi Cat Girl

The player character is never even seen...

I wonder what s/he looks like.


This one's never given a name.

"Debug" Graphic


Present in the tiles for the living room is "Debug", in an odd font.


In the mornings, the Sleep option is grayed out. Forcing the game to select it during the morning displays this otherwise-unused text:

It's too early to go to bed...

Sound Test

To do:
Does this exist in the other versions?
Nakayoshi Pet Advance Series 3 - Kawaii Koneko J GBA Sound Test.png

Code 03000CD409 (Japanese version) will start the main game at a sound test.

(Source: nensondubois)

Regional Differences

Japan US/Europe
Nakayoshi Pet Advance Series 3 - Kawaii Koneko J GBA Title.png Catzgba Title Screen.png

In Japan, Kawaii Koneko was the third game in MTO's Nakayoshi Pet Advance series, whereas elsewhere it became part of the somewhat more generic Petz franchise. For whatever reason, "2002 MTO Inc." was altered a bit, presumably to look consistent with the copyright symbol.