The Egg Guardian is able to attack by launching its fists at its foes. It then begins to rotate shooting machine gun rounds. The arms automatically appear again. The Egg Guardians cannot paralyzed by Silver's Psychokinesis when their two fists or Spheres are still attached to their bodies.
When hit when it has no arms, the enemy falls over and ejects its energy core. Repeated strikes to the core or Silver's Psychokinesis can destroy the robot. To deal much damage without hurt in Sonic and Shadow's cases, the player has to attack it before it launches it's fists as it will either hurt the player by it's explosion or hurt the player when it falls.
"These bipedal giants are deployed in great numbers. Egg Guardians consume a lot of energy, so they remain in a stand- by mode when not engaged in battle. When a target gets within range, the Egg Guardian roars into action, attacking with whatever weapon is fastened to the ends of its arms. Most Egg Guardians are fitted with massive fists that can either be used for melee attacks or fired at an enemy. The fists move slowly through the air and explode on impact. Fewer Egg Guardians are equipped with huge steel spheres at the end of each arm, which are used as projectiles. The Egg Guardian has a weak spot: its energy core, which sits in the middle of its torso. If struck in the core, the mech falls and the core is partially ejected. Repeated strikes to the core will destroy the robot."
Egg Keepers are the advanced versions of the Egg Guardians. They are similar in appearance, but have a red and grey color scheme and have increased speed and armor, meaning it takes more to to destroy them than The Egg Guardians. Their attacks are similar to the Egg Guardians but the only difference that after their fists or spheres are destroyed they will launch a volcanic lasers instead of shooting machine gun.