Claude now says no to Pokémon fan games and fan art, and a vibe coder spending up to $2,000 a month is furious

"Anthropic has cracked down and Claude models are starting to refuse work on Pokemon fan projects." That was BigKidNation, who has been building the real-time battler Pokémon Arena 2D with Claude, posting on X on Nov. 11. "All that money spent, never took a cent," he added. GamesRadar reported he has been putting up to $2,000 a month into the game.

According to Japan's AUTOMATON, Claude told him it would not use sprites that clearly depict Pokémon in a new build, no matter where the files are stored. When Retro Dodo tested it, Claude also refused to draw the characters, copy designs as SVGs or sprites, or use the logo and names, so fan art is off the table too. AUTOMATON's post on the story passed 1,100 likes and 150,000 views.

It traces back to the "no recreating existing games" rule that showed up in Claude Code on Oct. 30. It is controlled by a server-side flag users can't switch off (tengu_heron_brook), and renaming a project or calling it original doesn't get around it. AUTOMATON says the rule has since been spelled out to cover names, characters, art, music, levels and look, plus "similar mechanics." Pokémon is the first confirmed case of Claude refusing over a specific franchise. Anthropic has not announced the change.

GoNintendo noted it isn't clear whether The Pokémon Company threatened legal action or Anthropic acted on its own. Retro Dodo, which says Claude-assisted Pokémon games flooded out this year with some collecting money on Patreon and Ko-fi, called the rule a good thing. "If you're a fan, draw it yourself," Japanese user @sousuke_c wrote, drawing 179 likes. BigKidNation says his game is still due in December.