Collect the Chaos Emeralds to help a Gizoid friend becomes stronger in Sonic Battle! Discover friendship as you explore the world to gather the Chaos Emeralds! Sonic Battle is a fighting adventure video game and the second fighting game in the Sonic the Hedgehog series. The game was released on Game Boy Advance (GBA) in 2003 and 2004. The game begins when Dr. Eggman discovers the artifact found by his grandfather, Professor Robotnik. A 4000-year-old sentient weapon called Gizoid that has the ability to replicate any moves. He abandons the Gizoid at the Emerald Beach after failing to make it work. In this game, you will control Sonic the Hedgehog as you discover Gizoid. Challenge your friends and defeat the enemies sent by Dr. Eggman.