Massive Pokemon GSC leak has source code and beta creature designs for second-gen games

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Building upon the Space World GS demo that was leaked a while back, and a source code leak of Pokemon Blue, is a brand new discovery, involving the second-generation Pokemon games once more. Supposedly, multiple early builds of Pokemon Gold/Silver are out and about on the internet, courtesy of an anonymous 4chan user. Despite the dubious source, the alleged leak contains data for beta designs of the gen 2 Pokedex, complete with unfinished beta designs of many Pokemon featured throughout the early Gold/Silver versions, along with the source code for Pokemon Crystal. The file is 784.2 MiB.

There is a veritable treasure trove of information to dig through, including the wildly different concept sprites for some of the Johto Pokemon, a GameBoy emulator created for testing purposes by Nintendo themselves, debug builds, and much more.

NSW_S_C-132.png NSW_S_C-137.png NSW_S_C-138.png NSW_S_C-163.png NSW_S_C-175.png
NSW_S_C-185.png NSW_S_C-188.png NSW_S_C-248.png NSW_S_C-250.png

The builds themselves cannot be shared here, though they are floating around on the internet.

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:arrow: Source: beta build screencaps
 

Brigand

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is that pokemon no. 222 a supposed evolution of ditto? i could never imagine how those work. can anyone tell me whats with the 10 in its name?


never in 1000 years i couldve figured out that was actually celebi LMAO
That Pokemon is in Corsola's Pokedex spot, but my best guess would be a Slugma prototype. The "みてい[number]", which can also be seen on Celebi, is likely a placeholder for a Pokemon whose name has not yet been determined, as "mitei" denotes something that is not yet decided.
 

RupeeClock

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A lot of these look like placeholder designs, as in they represent the design concept that's still in production, or doesn't yet have a proper sprite in place.

Others look like they put a release candidate design in place to see if it felt right, and ultimately decided against it and went for another design that better fit their world building idea.

That early Larvitar sprite is still funny though.
 
Last edited by RupeeClock,
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FAST6191

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This is incredibly exciting. Can't wait to see the homebrew that comes from this. I would love to play through a hybrid game.
There has been a nice commented disassembly for various pokemon games for quite a while now, certainly one you could assemble, and dozens of tools that allow the users of said tools to make extensive changes to the games.

Results of that? I assume you already don't pay attention to pokemon hacks and wait for people to pick out any quality and shout that far and wide.
 

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