Tetsuwan Tantei Robotack

The story begins when the Ruling Elder of Harappa Land sends a few of his robotic people to seek out the sacred treasure of their kingdom: The Landtool. Two such robots, Robotack and Kamerock, arrived at a place called Yumegaoka. It was there that Robotack befriended a boy named Kakeru and aided the boy's uncle, Kaoru Sugi, in his Private Investigation business. But also on the quest for the LandTool are DarkCrow and his lucky Kabados, who were exiled and intended to make money off the LandTool.