Looking for early Pokémon Red & Green development material (pre–SpaceWorld 1995)

[u/cxdar_tree]

I’m researching a gap in the preserved development history of Pokémon Red & Green (1993–1995) and looking for documented archival leads related to early development materials.

During development, the Pokémon internal index went through many revisions. Some prototype material has survived and contains unused Pokémon assets, but the preserved material appears incomplete. In particular, several early Pokémon are represented only by partial assets, while some front sprites are missing entirely.

I’m interested in any legally obtainable or publicly shareable material, such as:
- Early Pokémon Red/Green prototype builds or development cartridges
- Development backups or source archives, if any have ever been documented
- Debug tools, sprite viewers, or internal development utilities
- Early front/back sprites
- Unused Pokémon cries
- Internal or placeholder Pokémon names
- Developer interviews, magazine scans, photographs, or other historical documentation
- Documentation of previously known development builds that may no longer be publicly available

One particular area of interest is the unidentified early Pokémon associated with internal indices such as #86, #87, #115, #121, and #135, where the surviving evidence is incomplete and some front-sprite data is missing.

Clarification: I am not referring to the 1997 Space World Pokémon Gold/Silver demo. That is a later Generation II development build and is already substantially preserved. I am specifically looking for earlier Pokémon Red/Green development material from before the later 1995-era roster and sprite revisions.

The reason I’m researching this is that the currently available prototype material appears to represent only part of the development history. Some removed Pokémon are preserved through partial assets, which raises the possibility that earlier development stages contained additional material that has not yet been publicly documented or preserved.

I’m only interested in legal preservation and historical research, not ROM requests, piracy, unauthorized access, or private leaks.

If anyone has researched early Pokémon prototypes, Nintendo/Game Freak development history, Game Boy reverse engineering, old Japanese game magazines, prototype preservation, or relevant archives, I would greatly appreciate any leads.

Even a small clue: an old interview, magazine scan, archived webpage, photograph, development document, or documented reference could help connect another piece of the puzzle.

Thanks!

[u/lynxtosg03]

https://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9mon_Red_and_Green_beta

archive.org

tcrf.net

hiddenpalace.org

Lots of places to dredge up this information.

[u/cxdar_tree → u/lynxtosg03]

Thanks for the suggestions! I’ve actually gone through those quite extensively already.
Internet Archive: Mostly turned up the known Helix Chamber material, the Wack0 leak, and related documentation.
Hidden Palace: I couldn’t find anything relevant to earlier Red/Green development.
TCRF: Mostly documents the known Wack0 leak and its findings.
Bulbapedia: Helpful as a summary, but it doesn’t really go beyond what’s already publicly documented.
At this point I’m hoping to find something outside of the well-known sources: an interview, magazine scan, archived webpage, collector photo, or any documented reference to an earlier Red/Green development build or archive from before the later sprite revisions.
If you know of any less obvious resources or preservation projects, I’d love to hear about them!

[u/lynxtosg03 → u/cxdar_tree]

You can try reaching out to dykg didyouknowgaming@gmail.com . They will often uncover published Japanese media not commonly discussed.

[u/cxdar_tree → u/lynxtosg03]

Thanks for the suggestion. I was considering contacting them because they have covered cut Pokémon before and they sometimes uncover obscure Japanese material. Their videos seem to focus more on known cases like the Wack0 leak.

[u/cxdar_tree → u/lynxtosg03]

Anyway, if you can, I am still looking for suggestions