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Space-Net: Cosmo Red and Cosmo Blue

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Title Screen

Space-Net: Cosmo Red and Cosmo Blue

Developer: Timenet
Publisher: Imagineer
Platform: Game Boy Color
Released in JP: March 16, 2001

MinigameIcon.png This game has unused modes / minigames.
GraphicsIcon.png This game has unused graphics.
TextIcon.png This game has unused text.

NotesIcon.png This game has a notes page

To do:
  • A Japanese YouTube user was also talking about secret text with the character Tink. Is this a used Easter egg or an unused one?
  • There are some leftover sounds from Sanrio Timenet: Kako Hen and Mirai Hen - some are used, others might not.

Space-Net: Cosmo Red and Cosmo Blue is a pair of monster-battling games and the spiritual successor to Sanrio Timenet: Kako Hen and Mirai Hen. In this game, the player "recruits" monsters to join the ISNA (International Space-Net Agency) rather than "catching" them. The game also doesn't include Sanrio characters.

According to the Nintendo Space World site, the games had working titles of "Space-Net SN-01" and "Space-Net SN-02".

The September 2020 lot check leak (and a post by illustrator Katsutoshi Fujioka) revealed that a third version, Space-Net: Cosmo Neo, was produced but never released.


Miscellaneous tidbits that are interesting enough to point out here.

Unused Message Box Pictures

Text command EC XX will print a character message box. For a list of index numbers, see the notes.

Using codes 0100C3C7, 01D0C4C7, 01EC00D0 and 01xx01D0 one can force a box with the picture to appear.

All 256 IDs are indexed. Many IDs are curiously copies of Mūra with a different attribute. These are common so it's of limited use listing them.

Other specific unused IDs are listed below:

  • 20: The picture is corrupted, but this is in the middle of the data. Perhaps the picture pointed somewhere valid before.
  • 39: Like 20, this is not the last valid index number, but the sprite is invalid.
  • 3F: Another corrupted picture as before.
  • FC: Solid black box.

(Since this game and knowledge of all its characters is obscure, some other unused IDs may exist.)

The above unused IDs (except for FC which is still a full black box) while corrupted in Cosmo Red and Cosmo Blue, will actually bring up valid pictures in the Cosmo Neo prototype, as such:

ID Cosmo Red and Cosmo Blue Cosmo Neo
20 Space Net corrupted picture 20.png Space Net Neo prototype picture 20.png
39 Space Net corrupted picture 39.png Space Net Neo prototype picture 39.png
3F Space Net corrupted picture 3F.png Space Net Neo prototype picture 3F.png
(Source: Torchickens)

Shooting Game

A shooting game that seems to be unused. Use codes 0146C3C7 and 017AC4C7 to load it via a conversation box, but the "points" and "time" sub-tiles will be glitched. The aim is to shoot number panels which appear on the screen with A.

A video of it in action can be found here.

Space Net shooting game.png

(Source: Torchickens)

Unused Text


"Put message here": This seems to be placeholder text (used in error messages?) for the spaceship's mascot AI. It's usually followed by a character such as "9", "A", or "B". To see one of the texts, enter the overworld, enable code 01DF00D8, then open the ship menu with Start.

(Source: Torchickens)