From Wikipedia:
"Good-Feel, Inc. is a Japanese video game developer. Good-Feel began in Hyogo, Japan in 2005 and soon opened a production facility in Tokyo. Their main focus has been educational games for the Nintendo DS, which have solely been released in Japan. The games, the first of which was released in 2007, consist of primers for very small children (kindergarten and below) and English language training for kids and adults.
In 2008 the company transitioned into mainstream video games by becoming the developer for the Wii game Wario Land: The Shake Dimension (ワリオランド シェイク, Wario Rando Sheiku) from the large publisher Nintendo. This marks Good-Feel's first entry into the home console market.
The company was founded by former Konami employee Etsunobu Ebisu on March 10, 2005. He told Nintendo about the new company and asked if they could work on a game. Long-time Nintendo employee Takahiro Harada asked Ebisu if he would like to make a new Wario Land title, since Harada learned before the meeting that Ebisu was involved in the development of a Nintendo DS platform game he enjoyed very much, and Harada always wanted to make a Wario Land sequel. Though Ebisu suggested a shooting game, he agreed to create a platform game after Harada convinced him. The development resulted in Wario Land: The Shake Dimension, a 2D platform game released in 2008 with hand-drawn graphics made with the help of the animation studios Production I.G and Kusanagi."