404 Media

2025-09-15 13:18:05

AI-Powered Animal Crossing Villagers Begin Organizing Against Tom Nook

A software engineer in Austin has hooked up Animal Crossing to an AI and breathed new and disturbing life into its villagers. Using a Large Language Model (LLM) trained on Animal Crossing scripts and an RSS reader, the anthropomorphic folk of the Nintendo classic spouted new dialogue, talked about current events, and actively plotted against Tom Nook’s predatory bell prices.

The Animal Crossing LLM is the work of Josh Fonseca, a software engineer in Austin, Texas who works at a small startup. Ars Technica first reported on the mod. His personal blog is full of small software projects like a task manager for the text editor VIM, a mobile app that helps rock climbers find partners, and the Animal Crossing AI. He also documented the project in a YouTube video.
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Fonseca started playing around with AI in college and told 404 Media that he’d always wanted to work in the video game industry. “Turns out it’s a pretty hard industry to break into,” he said. He also graduated in 2020. “I’m sure you’ve heard, something big happened that year.” He took the first job he could find, but kept playing around with video games and AI and had previously injected an LLM into Stardew Valley.

Fonseca used a Dolphin emulatorrunning the original Gamecube Animal Crossing on a MacBook to get the project working. According to his blog, an early challenge was just getting the AI and the game to communicate. “The solution came from a classic technique in game modding: Inter-Process Communication (IPC) via shared memory. The idea is to allocate a specific chunk of the GameCube's RAM to act as a ‘mailbox.’ My external Python script can write data directly into that memory address, and the game can read from it,” he said in the blog.

He told 404 Media that this was the most tedious part of the whole project. “The process of finding the memory address the dialogue actually lives at and getting it to scan to my MacBook, which has all these security features that really don’t want me to do that, and ending up writing to the memory took me forever,” he said. “The communication between the game and an external source was the biggest challenge for me.”

Once he got his code and the game talking, he ran into another problem. “Animal Crossing doesn't speak plain text. It speaks its own encoded language filled with control codes,” he said in his blog. “Think of it like HTML. Your browser doesn't just display words; it interprets tags like <b> to make text bold. Animal Crossing does the same. A special prefix byte, CHAR_CONTROL_CODE, tells the game engine, ‘The next byte isn't a character, it's a command!’”

But this was a solved problem. The Animal Crossing modding community long ago learned the secrets of the villager’s language, and Fonseca was able to build on their work. Once he understood the game’s dialogue systems, he built the AI brain. It took two LLM models, one to write the dialogue and another he called “The Director” that would add in pauses, emphasize words with color, and choose the facial animations for the characters. He used a fine-tuned version of Google’s Gemini for this and said it was the most consistent model he’d used.

To make it work, he fine-tuned the model, meaning he reduced its input training data to make it better at specific outputs. “You probably need a minimum of 50 to 100 really good examples in order to make it better,” he said.

Results for the experiment were mixed. Cookie, Scoot, and Cheri did indeed utter new phrases in keeping with their personality. Things got weird when Fonseca hooked up the game to an RSS reader so the villagers could talk about real world news. “If you watch the video, all the sources are heavily, politically, leaning in one direction,” he said. “I did use a Fox news feed, not for any other reason than I looked up ‘news RSS feeds’ and they were the first link and I didn’t really think it through. And then I started getting those results…I thought they would just present the news, not have leanings or opinions.”

“Trump’s gonna fight like heck to get rid of mail-in voting and machines!” Fitness obsessed duck Scoot said in the video. “I bet he’s got some serious stamina, like, all the way in to the finish line—zip, zoom!”

The pink dog Cookie was up on her Middle East news. “Oh my gosh, Josh 😀! Did you see the news?! Gal Gadot is in Israel supporting the families! Arfer,” she said, uttering her trademark catchphrase after sharing the latest about Israel.

In the final part of the experiment, Fonseca enabled the villagers to gossip. “I gave them a tiny shared memory for gossip, who said what, to whom, and how they felt,” he said in the blog.The villagers almost instantly turned on Tom Nook, the Tanuki who runs the local stores and holds most of Animal Crossing's inhabitants in debt. “Everything’s going great in town, but sometimes I feel like Tom Nook is, like, taking all the bells!” Cookie said.

“Those of us with big dreams are being squashed by Tom Nook! We gotta take our town back!” Cheri the bear cub said.

“This place is starting to feel more like Nook’s prison, y’know?” Said Scoot.
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Why do this to Animal Crossing? Why make Scoot and Cheri learn about Gal Gadot, Israel, and Trump?

“I’ve always liked nostalgic content,” Fonscesca said. His TikTok and YouTube algorithm is filled with liminal spaces and music from his childhood that’s detuned. He’s gotten into Hauntology, a philosophical idea that studies—among other things—promised futures that did not come to pass.

He sees projects like this as a way of linking the past and the future. “When I was a child I was like, ‘Games are gonna get better and better every year,’’ he said. “But after 20 years of playing games I’ve become a little jaded and I’m like, ‘oh there hasn’t really been that much innovation.’ So I really like the idea of mixing those old games with all the future technologies that I’m interested in. And I feel like I’m fulfilling those promised futures in a way.”

He knows that not everyone is a fan of AI. “A lot of people say that dialogue with AI just cannot be because of how much it sounds like AI,” he said. “And to some extent I think people are right. Most people can detect ChatGPT or Gemini language from a mile away. But I really think, if you fine tune it, I was surprised at just how good the results were.”

Animal Crossing’s dialogue is simple and that simplicity makes it a decent test case for AI video game marks, but Fonseca thinks he can do similar things with more complicated games. “There’s been a lot of discussion around how what I’m doing isn’t possible when there’s like, tasks or quests, because LLMs can’t properly guide you to that task without hallucinating. I think it might be more possible than people think,” he said. “So I would like to either try out my own very small game or take a game that has these kinds of quests and put together a demo of how that might be possible.”

He knows people balk at using AI to make video games, and art in general, but believes it’ll be a net benefit. “There will always be human writers and I absolutely want there to be human writers handling the core,” he said. “I would hope that AI is going to be a tool that doesn’t take away any of the best writers, but maybe helps them add more to their game that maybe wouldn’t have existed otherwise. I would hope that this just helps create more art in the world. I think I see the total art in the world increasing as a good thing…now I know some people would say that using AI ceases to make it art, but I’m also very deep in the programming aspect of it. What it takes to make these things is so incredible that it still feels like magic to me. Maybe on some level I’m still hypnotized by that.”

Modder injects AI dialogue into 2002’s Animal Crossing using memory hack

Unofficial mod lets classic Nintendo GameCube title use AI chatbots with amusing results.

^{Benj Edwards (Ars Technica)}

404 Media

2025-09-15 13:14:17

Airlines Sell 5 Billion Plane Ticket Records to the Government For Warrantless Searching

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This article was primarily reported using public records requests. We are making it available to all readers as a public service. FOIA reporting can be expensive, please consider subscribing to 404 Media to support this work. Or send us a one time donation via our tip jar here.

A data broker owned by the country’s major airlines, including American Airlines, United, and Delta, is selling access to five billion plane ticketing records to the government for warrantless searching and monitoring of peoples’ movements, including by the FBI, Secret Service, ICE, and many other agencies, according to a new contract and other records reviewed by 404 Media.

The contract provides new insight into the scale of the sale of passengers’ data by the Airlines Reporting Corporation (ARC), the airlines-owned data broker. The contract shows ARC’s data includes information related to more than 270 carriers and is sourced through more than 12,800 travel agencies. ARC has previously told the government to not reveal to the public where this passenger data came from, which includes peoples’ names, full flight itineraries, and financial details.

“Americans' privacy rights shouldn't depend on whether they bought their tickets directly from the airline or via a travel agency. ARC's sale of data to U.S. government agencies is yet another example of why Congress needs to close the data broker loophole by passing my bipartisan bill, the Fourth Amendment Is Not For Sale Act,” Senator Ron Wyden told 404 Media in a statement.

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Do you know anything else about ARC or the sale of this data? I would love to hear from you. Using a non-work device, you can message me securely on Signal at joseph.404 or send me an email at joseph@404media.co.

ARC is owned and operated by at least eight major U.S. airlines, publicly released documents show. Its board of directors includes representatives from American Airlines, Delta, United, Southwest, Alaska Airlines, JetBlue, and European airlines Air France and Lufthansa, and Canada’s Air Canada. ARC acts as a bridge between airlines and travel agencies, in which it helps with fraud prevention and finds trends in travel data. ARC also sells passenger data to the government as part of what it calls the Travel Intelligence Program (TIP).

TIP is updated every day with the previous day’s ticket sales and can show a person’s paid intent to travel. Government agencies can then search this data by name, credit card, airline, and more.

The new contract shows that ARC has access to much more data than previously reported. Earlier coverage found TIP contained more than one billion records spanning more than 3 years of past and future travel. The new contract says ARC provides the government with “5 billion ticketing records for searching capabilities.”

Screenshots of the documents obtained by 404 Media.

404 Media obtained the contract through a Freedom of Information Act (FOIA) with the Secret Service. The contract indicates the Secret Service plans to pay ARC $885,000 for access to the data stretching into 2028. A spokesperson for the agency told 404 Media “The U.S. Secret Service is committed to protecting our nation’s leaders and financial infrastructure in close coordination with our federal, state, and local law enforcement partners. To safeguard the integrity of our work, we do not discuss the tools used to conduct our operations.” The Secret Service did not answer a question on whether it seeks a warrant, subpoena, or court order to search ARC data.

404 Media has filed FOIA requests with a wide range of agencies that public procurement records show have purchased ARC data. That includes ICE, CBP, ATF, the SEC, TSA, the State Department, U.S. Marshals, and the IRS. A court record reviewed by 404 Media shows the FBI has asked ARC to search its databases for a specific person as part of a drug investigation.
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The ATF told 404 Media in a statement “ATF uses ARC data for criminal and investigative purposes related to firearms trafficking and other investigations within ATF’s purview. ATF follows DOJ policy and appropriate legal processes to obtain and search the data. Access to the system is limited to a very small group within ATF, and all subjects searched within ARC must be part of an active, official ATF case/investigation.”

An ARC spokesperson told 404 Media in an email that TIP “was established by ARC after the September 11, 2001, terrorist attacks and has since been used by the U.S. intelligence and law enforcement community to support national security and prevent criminal activity with bipartisan support. Over the years, TIP has likely contributed to the prevention and apprehension of criminals involved in human trafficking, drug trafficking, money laundering, sex trafficking, national security threats, terrorism and other imminent threats of harm to the United States.”

The spokesperson added “Pursuant to ARC’s privacy policy, consumers may ask ARC to refrain from selling their personal data.”

After media coverage and scrutiny from Senator Wyden’s office of the little-known data selling, ARC finally registered as a data broker in the state of California in June. Senator Wyden previously said it appeared ARC had been in violation of Californian law for not registering while selling airline customers’ data for years.

Airline-Owned Data Broker Selling Your Flight Info to DHS Finally Registers as a Data Broker

It’s a legal requirement for data brokers to register in the state of California. ARC, the airlines-owned data broker that has been selling your flight information to the government for years, only just registered after being contacted by the office …

^{Joseph Cox (404 Media)}