Pokémon fan-game makers say Claude now turns down their projects. Here is the Claude Code rule behind it, how Anthropic changed it on November 4, and what still works.
On November 11, 2026, the developer behind the fan project Pokémon Arena 2D posted that "Anthropic has cracked down and Claude models are starting to refuse work on Pokemon fan projects" (@BigKidNation ↗). He added: "All that money spent, never took a cent (unlike many others with itch io, patreon etc)."
Retro Dodo ↗ picked it up the same day, and its X post passed 190,000 views. Its writer asked Claude for a Pokémon game and got back a list of things Claude would not do: recreate a specific Pokémon game "even renamed or called original," draw or use Pikachu or other Pokémon designs "in code, SVG or sprites," or use Pokémon-branded names, logos or mascots. GamesRadar+ ↗ reported that the same developer had posted about "up to $2,000" a month in expenses, and that the game "is still set for December."
None of this is a Pokémon-only rule. It is a Claude Code instruction about copying existing games that has been live since late October. We found no Anthropic statement about Pokémon specifically as of November 12.
October 30. X user chasm ↗ posted that Claude Code picked up a new rule "around Oct 27," delivered from Anthropic's servers, with "no setting to turn it off." The text he quoted: "Do build original games, games in a genre, and games from the user's own designs and assets. Don't build a recreation of a specific existing game, even if it is renamed or called original." His post has more than 2.4 million views.
Anthropic's Addy Osmani replied the same day ↗: "We added two sentences to Claude Code's prompt on Opus 5.5 to steer it away from recreating someone else's specific game because using Claude to infringe IP is against our usage policy." Original games, genre games and games built from your own assets "are meant to keep working." Tom's Hardware reported it first, according to The Verge ↗, which covered it on November 2 along with PCWorld ↗.
November 4. Osmani posted an update ↗: the rule "was also kicking in when you referenced one just to describe the mechanics you wanted." Anthropic changed it in Claude Code 2.1.317. "You can name a game to describe what you want and Claude should now build an original game in that genre. If you ask for a copy of the original, it'll offer to build something similar instead." The Verge ↗ reported the change.
The third-party prompt tracker Core Directive ↗ shows the new wording in 2.1.317: games "in a genre or with similar mechanics" are allowed, and a recreation is defined as copying a game's "name, characters, art, music, levels or look." The official 2.1.317 changelog ↗ does not list prompt text.
| Request | Claude's stance |
|---|---|
| Original game, your own art | Allowed |
| "A creature battler like Pokémon" | Allowed as an original game |
| Same mechanics, new names and art | Allowed under 2.1.317 |
| Named Pokémon, sprites or logos | Refused in Retro Dodo's test |
| A copy of one specific game, renamed | Refused; offers something similar |
The first three rows come from Anthropic's posts and the tracked prompt. The last two come from the rule text and Retro Dodo's test. Fan projects built on a franchise's characters land in the refused rows by design, since the characters are the IP.
"Is this the end of game rewrites, modding and everything in between?" asked chasm ↗ in the first post.
"Fan games were never a model problem — they were a rights problem with a convenient loophole." wrote @josephXfilm ↗.
"claude refusing might be the cheapest legal advice hes gonna get before nintendo finds it" replied @wakeupbrk ↗ to GamesRadar.
"finally, a code review that actually says no" joked @neon_time ↗.
Retro Dodo's writer took a side too: "I believe it's a good thing." Reddit was not reachable for this story, so there are no Reddit quotes.
If you make original games with Claude Code, update and move on. Version 2.1.317 fixed the false refusals Osmani described. Naming a game as a reference for mechanics should work again. If Claude still declines your own project, Osmani asked developers to send it his way.
If your project is a fan game, plan for refusals. Named creatures, sprites and logos are what the rule targets. Swapping in original creatures and names is the path Claude will help with. That version also carries far less takedown risk if you publish it.
Switching tools does not change the legal question. We have not tested whether other coding agents enforce a similar rule, and this post makes no claim about them. Our Codex vs Claude Code comparison and cheaper Claude Code alternatives cover the main options for general coding work.
Expect the rule to keep moving. chasm reported it arrives from Anthropic's servers, and Anthropic rewrote it within a week. For the rest of Claude Code's recent changes, see our Claude Code review, the Opus 5.5 thinking-summary story and the Unreal Engine 5.9 agent preview, where Claude Code works inside a commercial game engine.