He spent thousands on AI to build a Pokémon fan game. Now Claude won't help: Anthropic's 'no game clones' rule starts naming names

If you've seen videos of people building entire games on their own with AI, there's a good chance one of them was a Pokémon project. On Claude, that path now appears to be closed.

Japanese gaming outlet AUTOMATON reported on Thursday (Beijing time) that multiple users say Anthropic's Claude assistant has started refusing to help make Pokémon fan games and game assets. The most visible case is a developer who goes by Big Kid Nation. He posted on Nov. 11 that Claude had begun turning down Pokémon fan projects, and on Nov. 12 he shared the actual conversation: asked to build a new game from sprites (the small pixel-art character images used in games) showing Pokémon characters, Claude refused. When he asked whether it mattered that the files were already saved on his own computer, Claude said it did not.

The stakes are real for him. According to Kotaku, his project, Pokémon Arena 2D, is a real-time battle fan game in development since February and built largely through "vibe coding," meaning he describes what he wants in plain language and AI writes most of the code. He says he spends more than $2,000 a month on AI usage alone, and he still hopes to release it on mobile and PC in December.

Why the sudden change? AUTOMATON traces it back to Oct. 30, when an X user known as chasm spotted a new rule in Claude Code, Anthropic's coding tool: build original games, genre games, or games from the user's own designs and assets, but don't build a recreation of a specific existing game, even if it is renamed or called original. AUTOMATON says the rule is controlled by an internal flag users cannot switch off, and that Anthropic's Addy Osmani, who works on Claude Code, acknowledged on X at the time that the prompt had been added because using Claude to infringe IP violates the company's usage policy.

What's new is that the rule is getting specific. AUTOMATON cites analysis saying the rule text now explicitly lists names, characters, art, music, levels and appearance as things that can't be copied. Another outlet, Retrododo, tested Claude and found it also refuses to draw Pikachu or other Pokémon, copy their designs in code, SVG vector graphics or sprites, or use Pokémon names and logos. That suggests the limits reach beyond games to other unofficial Pokémon projects. One caution: these details come from user reports and outlet testing. Anthropic has not made a public statement about Pokémon specifically, and there's no evidence that The Pokémon Company or Nintendo asked Anthropic for the change.

The backdrop: over the past year AI has made coding and art far easier, and the internet has filled up with AI "recreations" of existing games, including knockoffs built from trailers before the real game even shipped. Game companies and indie developers have pushed back. For an AI company, letting users mass-produce famous characters, music and whole games could also mean legal exposure. Claude's approach puts a checkpoint at the model level. Whether other AI companies will follow is unclear, and other tools may not have the same limits.

What it means for you: AI is happy to help you make something original, and increasingly unwilling to help you copy something famous. If you want to build a small game for fun with your own characters and art, you're unlikely to notice. If you're planning a fan project that borrows a big franchise, especially one you hope to make money from, expect AI tools to say no, and the rights holder may have something to say too. Where exactly that line sits, and whether it catches legitimate creative work, will be argued over for a while.

Original sources published: AUTOMATON, Nov 12, 2026, 16:03 Beijing time / 3:03 AM EST; Kotaku, Nov 12, 2026, 19:00 Beijing time / 6:00 AM EST; IT之家 (IT Home), Nov 12, 2026, 18:45 Beijing time / 5:45 AM EST