Metal Walker

The main character and his father Tetsuo Kurama have devoted their lives to search for lost Core Units on the island, but the game opens as the father is separated from his son as a gang of Metal Busters attack. The main character and his Metal Walker, Meta Ball, must then search for his father on the island. Professor Hawk, Tetsuo's employer tells the main character that his father will be found where there are Core Units, so he then goes to seek them out.