Mitchell Corporation is a video game company located in Japan. They are best known for their puzzle video games that range from titles such as Polarium to Magnetica. They have partnered with Nintendo on multiple occasions and currently develop games exclusively for the company's consoles and handhelds though they also work on arcades too. Their Puzz Loop series is perhaps their best-known video game and was remade for Nintendo consoles under the name Magnetica. They were founded all the way back in 1960.Seems to suspended its operations since 2012