Game Freak — the primary developer of the Pokémon games — suffered a massive data breach. Pokémon creator, Nintendo, confirmed this leak on Sunday, which involved not only a massive amount of personal information, but supposed unused concept art and lore stories involving the franchise.

Hackers released a collection of leaked data from Pokémon game developer Game Freak over the weekend, including personal information about employees. Game Freak — which develops the main lineup of Pokémon video games — confirmed the breach in a statement,

This weekend, reports of an alleged hack on Game Freak, the studio behind Pokémon, surfaced. Social media and various forums were flooded with leaked information about the past and future of the franchise.

The Pokémon developer has apologized for an employee data breach, but news reports indicate that IP on old and upcoming games has been stolen, too.