GungHo Online Entertainment
From the Super Mario Wiki
GungHo Online Entertainment is a video game developer in Tokyo, Japan, that was founded in 1998. It is best known as the host of the Japanese Ragnarok Online server and the developer of Ragnarok DS for the Nintendo DS, as well as the mobile game Puzzle & Dragons. They developed a spin-off game of Puzzle & Dragons based on the Super Mario series, Puzzle & Dragons: Super Mario Bros. Edition.