In March 2018, a Pokémon enthusiast known online as "Wack0" and "__" successfully gained unauthorized access to some of Nintendo's systems, on which he found and downloaded plenty of unreleased materials. For obvious reasons, he did not release said content to the public, rather circulating it to a limited audience.
While some of those files were eventually published, chiefly the "SpaceWorld 97" Japanese demos of generation II games, not much of the above facts became known to the public until last Christmas, when an involved person known as Ganix spoke out on the matter.
As of 2020-3-11 more of those contents were posted anonymously on 4chan's /v/ board, chiefly:
- A file called pack_4m4IZ6j.zip, containing beta versions of Pokémon Gold and Silver in debug and non-debug versions, plus object files used to generate them and the official documentation (in Japanese) written for Super Mario Club (Nintendo's in-house testing division);
- A password-protected ("poke1024") file called osrc.zip, containing full assembly-language source code and object files for producing the English versions of Pokémon Blue and Yellow, as well as internal communications between Game Freak, Nintendo Co. Ltd (Japan), the above-mentioned Super Mario Club, and Nintendo of America. Curiously, the file located at "yellow/source/header.dmg" in the archive refers to the game's code as being for "Pocket Monsters Pink & Yellow";
- An archive called weavileusedsurf.7z, containing prerelease in-game artwork of Pokémon Diamond and Pearl, which were previously distributed in December 2019.
For copyright reasons the above-mentioned files cannot be posted or linked to on GBAtemp, however the involved discussion on 4chan may still be available for a limited time by searching the Internet for the phrase "Where were you when the pokemon blue and yellow".
The above-mentioned archives have SHA-1 hashes of, respectively, 5E3D0F6C08ADF2DFADB701CB2E04EEBA06AE27F8, FC6D5646C4A6C7A14D5A94B7A2D0627277AD429E, and 46636039BFEA4C1058B2BD4D54458A48ECCA0BFA, and are known to have been reposted on a Telegram channel.
Last edited by Ryccardo, , Reason: corrected description of pack_4m4IZ6j.zip