Intelligent Systems Co., Ltd. (株式会社インテリジェントシステムズ, Kabushiki-Gaisha Interijento Shisutemuzu?) is a video game developer and internal team of Nintendo Co., Ltd. It was founded in 1986.
Intelligent Systems came into being when members of Nintendo's Nintendo Research & Development 1 division headed by Gunpei Yokoi splintered off into its own development team. Yokoi worked alongside Intelligent Systems on a number of its titles before his departure from Nintendo following the disappointing reception of the Virtual Boy console. Intelligent Systems is known for creating or expanding some of the most well-received Nintendo franchises, bolstering series like Metroid, Nintendo Wars, Puzzle League, Paper Mario, WarioWare and Fire Emblem. In the past, the company has also designed many of Nintendo's development tools including the Super Nintendo Emulator SE.