No, I don't own any of these. If I did, they would be dumped and archived online. Some of these have been dumped and released by their owners, and some have not.
Click the image previews to see the full resolution version.
Pokemon Red + Blue
These particular cartridges are owned by luckyshop26, also known as 2Far 2Quit.
Left cartridge is Red, right cartridge is Blue.
The cartridges probably originated in Australia, game at a glance appears to be Final, circuitboard says Copyright 2000.
The fourth image is from steven78, who has sold some or all of his collection. My guess is that he was the former owner of these two cartridges.
YouTube video showing the cartridges (no gameplay): https://www.youtube.com/watch?v=q9nd86vbgTU
Status: Undumped
This particular Red cartridge is owned by MrTrippleAAA, and is being attempted to be dumped by Forest of Illusion.
From the original cartridge, the game boots but hangs after the title screen.
Twitter: https://twitter.com/forestillusion/status/1377818338793938945
Status: Undumped (Soon to be Dumped hopefully)
This cartridge is specifically noted to be German Red.
More research needs to be done on this particular cartridge.
Some info on PlatypusComix.com: http://platypuscomix.com/interactive/thingsyoucanteverhave16.html
Noted on ProjectPokemon: https://projectpokemon.org/home/forums/topic/39815-unreleased-prototype-pokemon/?do=findComment&comment=210048
Status: Undumped
This cartridge may have been sold, but as of 2015 belonged to someone named steven78 (aka "Steven Seventyeight" on YouTube and "steem69" on ebay).
More info on steven78 himself below...
Status: Undumped
Pokemon Gold + Silver
This is a prototype of German Silver, owned by MrTrippleAAA and dumped by Forest of Illusion.
Twitter: https://twitter.com/forestillusion/status/1377817162031591429?s=20
Status: Dumped!
This is a prototype of German Silver.
This was purchased and dumped by Deoxyz, and released by Digiex.
I believe Deoxyz re-sold it after it was dumped.
The third image is from steven78, who has sold some or all of his collection. My guess is that he was the former owner of this cartridge.
Digiex News Article: https://digiex.net/threads/pokemon-silver-german-prototype-demo-released.15645/
Digiex Forum Thread: https://web.archive.org/web/20191228115505/https://digiex.net/threads/pokemon-silver-prototype-demo-german-gameboy-download.15644/
Some info on gameboycolour.info: http://gameboycolour.info/en/pokemon-silver-german-demo-prototype-dev-developer-gbc-gameboy-color-cartridge.htm
Status: Dumped!
This cartridge was last seen owned by NintendoLife forum user brendand aka slaughternightmare.
It originated in Sydney, Australia.
NintendoLife forum post: https://web.archive.org/web/20180526123350/https://www.nintendolife.com/forums/retro/hi_everyone_i_just_joined_i_am_still_seeking_answers_all_over_the_internet_for_my_gameboy_cartridge
YouTube video 1: https://www.youtube.com/watch?v=DS9DWryD0xc
YouTube video 2: https://www.youtube.com/watch?v=TAaC_9d4LYM
AssemblerGames forum post archive (via AssemblerGames.org Archive Site): https://assemblergames.org/viewtopic.php?f=81&t=22726&hilit=pokemon+gold+prototype
AssemblerGames forum post archive (via Archive.org): https://web.archive.org/web/20141104164404/http://www.assemblergames.com/forums/showthread.php?38251-Is-this-a-Prototype-Cart
Status: Undumped
This particular cartridges is owned by luckyshop26, also known as 2Far 2Quit.
The cartridge is German Gold.
The second image is from steven78, who has sold some or all of his collection. My guess is that he was the former owner of this cartridge.
YouTube video showing the cartridge (no gameplay): https://www.youtube.com/watch?v=q9nd86vbgTU
Status: Undumped
Pokemon Crystal
These particular cartridges are owned by luckyshop26, also known as 2Far 2Quit.
The cartridges are Crystal. One of them is English, the other may be also.
YouTube video showing the cartridges (no gameplay): https://www.youtube.com/watch?v=q9nd86vbgTU
ebay listing: https://www.ebay.com/itm/333879453525
Status: Undumped
Unknown Game (Gen 1 + 2)
These cartridges, as of 2015, were owned by steven78 (aka "Steven Seventyeight" on YouTube and "steem69" on ebay).
I think it's likely most or all of these were sold to other private collectors since.
Games include Red, Blue, Gold, Silver, and Crystal.
Languages include English, Italian, Spanish, and German.
Green check marks mean those cartridges have been documented on this page above.
Orange circles mean those cartridges have been seen/confirmed in screenshots of ebay listings (and were most likely sold).
Forum Thread Archive URL 1: https://connect.gocollect.com/discussion/141182/pokemon-prototypes-demo-on-dmg-mbc3-16m-flash
Forum Thread Archive URL 2: https://www.nintendoage.com/discussion/141182/pokemon-prototypes-demo-on-dmg-mbc3-16m-flash
Forum Thread Archive URL 3: https://archive.nes.science/nintendoage-forums/nintendoage.com/forum/messageview8e5e.html?catid=35&threadid=141182
Forum Thread Archive URL 4: https://web.archive.org/web/20191023120853/http://nintendoage.com/forum/messageview.cfm?catid=35&threadid=141182
Status: Undumped
These were sold by uwobunnosuke on Yahoo! Auctions Japan.
I am detailing the two DMG-MBC3-16M-FLASH cartridges. This seller also sold two DMG-MBC5-32M-FLASH cartridges, but those are a lot more common and are not confirmed to have Pokemon games on them.
I'm detailing these two, because there is no evidence that a non-Pokemon prototype existed on one of these cartridges.
The two DMG-MBC3-16M-FLASH cartridges did not boot (but they were tested on a Wide Boy on N64).
Yahoo! Auctions Seller uwobunnosuke: https://web.archive.org/web/20210514213830/https://auctions.yahoo.co.jp/jp/show/rating?userID=uwobunnosuke&role=seller&apg=3
Auction 1: https://web.archive.org/web/20210514212858/https://webcache.googleusercontent.com/search?q=cache%3Ajyevrw8D15YJ%3Ahttps%3A%2F%2Faucfree.com%2Fitems%2Fg397197540+&cd=6&hl=en&ct=clnk&gl=us
Auction 2: https://web.archive.org/web/20210514213003/https://webcache.googleusercontent.com/search?q=cache%3AG16WQabTOdwJ%3Ahttps%3A%2F%2Faucfree.com%2Fitems%2Fm384103190+&cd=5&hl=en&ct=clnk&gl=us
Status: Undumped
A DMG-MBC3-16M-FLASH cartridge is owned by Xerxes (as of 2015). NintendoAge Forum Thread: https://www.nintendoage.com/discussion/142576/need-help-dumping-dmg-mbc3-16m-flash-cart
Status: Undumped
What's up with the DMG-MBC3-16M-FLASH cartridges?
Short answer: I don't exactly know. Long answer...-
(I will actually write this all out later, but for now just have some sources I'm citing.)
- Purin on Project Pokemon said the cartridges (likely from steven78) were the final retail game.
https://projectpokemon.org/home/forums/topic/39815-unreleased-prototype-pokemon/?do=findComment&comment=210057 - Yahoo! Auctions seller uwobunnosuke said they were Development Tools.
https://web.archive.org/web/20210514213003/https://webcache.googleusercontent.com/search?q=cache%3AG16WQabTOdwJ%3Ahttps%3A%2F%2Faucfree.com%2Fitems%2Fm384103190+&cd=5&hl=en&ct=clnk&gl=us - DMG-MBC5-32M-FLASH cartridges are a lot more common. Prototype builds of games have been found on these cartridges before. However, they look totally different. They're only similar in part-number.
Pokemon Ruby + Sapphire
A German debug ROM of Ruby was released by The Cutting Room Floor on October 16, 2011. Reddit Post: https://www.reddit.com/r/pokemon/comments/leed7/pokemon_ruby_german_debug_version/
TCRF Article (revision of it before the ROM was released): https://tcrf.net/index.php?title=Proto:Pok%C3%A9mon_Ruby_and_Sapphire&oldid=45747
Tweet 1: https://twitter.com/CuttingRoomWiki/status/110731013432418304
Tweet 2: https://twitter.com/CuttingRoomWiki/status/110739779078991873
Tweet 3: https://twitter.com/CuttingRoomWiki/status/125658114526683136
Hidden Palace article (hopefully accurate): https://hiddenpalace.org/Pokemon_Ruby_(German_debug_build)
Status: Dumped!
Pokemon Diamond + Pearl
A Japanese Debug ROM of Diamond was released by Ganix on July 17, 2019.
Ganix claimed the ROM was dumped from the debug cartridge above, and slightly modified to protect the developers' identities.
It is possible (even likely) that Ganix was given the files from Wack0, responsible for the Zammis Clark Breach in 2018 and subsequent leaks.
If that were the case, this ROM may have been compiled in 2018 or 2019 from the obtained source code.
The status on this is unknown.
Some info from protocrystal.neocities.org: https://protocrystal.neocities.org/timeline.html
RGDWiki article: https://wiki.mariocube.com/index.php?title=Zammis_Clark_Breach#April_2018_-_April_2020
Status: Dumped!