Anthropic’s AI assistant Claude is reportedly refusing to help developers create unofficial projects using Pokémon characters and other copyrighted assets. Recent tests and reports suggest that the restrictions extend beyond recreating existing games, with requests involving Pokémon artwork, sprites and other franchise-related assets also being rejected.
The issue gained attention after developer BigKidNation reported on November 11, 2026, that Claude had refused to assist with a Pokémon-related fan project.
In a follow-up shared on November 12, the developer showed an interaction in which Claude explicitly declined to use existing Pokémon assets when building a new game. The refusal reportedly covered Pokémon sprites and explained that changing the location of the files would not make their use acceptable.
This suggests that Claude’s restrictions are not limited to preventing users from copying an entire existing game. They may also affect developers attempting to incorporate recognisable copyrighted material into their own fan-made projects.
Claude Is Also Reportedly Rejecting Pokémon Fan Art Requests
The restrictions may extend beyond game development.
According to testing reported by gaming website Retro Dodo, Claude also refused requests to draw Pokémon characters or reproduce their designs through SVG illustrations and sprites.
Requests involving Pokémon logos and names were reportedly rejected as well.
This raises questions about how broadly Anthropic is applying its restrictions to unofficial projects based on established intellectual properties.
However, these reports should not be interpreted as confirmation that Claude has banned every discussion or creative use of Pokémon. The reported refusals concern requests to generate or reproduce identifiable franchise material, and the available tests do not establish that every possible fan-art prompt will receive the same response.
New Claude Code Rules Target Reproductions of Existing Games
The Pokémon-related refusals come shortly after Anthropic introduced additional restrictions in Claude Code, its AI-powered coding assistant.
On October 30, developer chasm reported the addition of a new internal flag called tengu_heron_brook. The restriction was designed to prevent Claude from helping users recreate existing games, even when they changed the original game’s name or described the project as an original creation.
According to subsequent reports, the guidance was later expanded to clarify what constitutes a recreation. It now explicitly identifies a game’s name, characters, artwork, music, levels and overall appearance as elements that fall under the restriction.
Interestingly, the updated wording reportedly distinguishes these identifiable elements from similar gameplay mechanics, which remain permissible.
The restrictions are therefore aimed at preventing users from reproducing recognisable aspects of existing games rather than prohibiting developers from creating original games inspired by familiar genres or mechanics.
Anthropic has not provided a public explanation establishing that every Pokémon-related fan project or fan-art request is prohibited. For now, the recent developer reports and independent tests offer a look at how these restrictions are being applied in practice.
With AI tools increasingly being used to develop games, illustrations and fan projects, how companies handle copyrighted characters and other intellectual property is becoming an increasingly important issue for both developers and fans. Bookmark Otaku Mantra for more updates!
