The story
Camelot was founded on April 4, 1994 by Shugo Takahashi, the brother of producer Hiroyuki Takahashi, with the intention of developing games for Sony's PlayStation. They developed their first game, Beyond the Beyond, while providing assistance to Sonic! Software Planning on Shining Wisdom. They would then provide assistance on Sonic's next game, Shining the Holy Ark.
In April 1998, after Sega merged its investment in Sonic into its subsidiary Nextech, Hiroyuki Takahashi joined Camelot as its president. Camelot then finished development of Shining Force III in Sonic's place and moved on to develop titles for Nintendo consoles.
The studio has developed many Mario sports games, including Mario Golf, and Mario Tennis, as well as the Golden Sun series of role-playing games.
The creation of the Mario character Waluigi can be attributed to Camelot, after Mario creator Shigeru Miyamoto consulted with them to create a "Wario-like" counterpart for Luigi during the development of Mario Tennis.
From Wikipedia’s article on Camelot Software Planning, shared under CC BY-SA 4.0.4