The E-1007 Heavy Egg Hammer look virtually the same as the Egg Hammer, except with a slightly purple tint, and the most obvious difference: they wear a helmet.
Heavy Egg Hammers are considered to be the most difficult enemy to defeat in Sonic Heroes as they are resistant even to Power attacks. Heavy Egg Hammers are invulnerable to all attacks except for the Team Blast. They have only one weak spot and it lies underneath their helmet. Removing the helmet can be a challenge in itself but can be done in two ways. After they use their spinning hammer attack, they can be knocked over either with Fire Dunk or Thunder Shoot. Their helmets will fall off when they fall over. The second way is to use a tornado attack to blow off the helmet. The weak spot is defined by a small blinking yellow and green light and can only be damaged by the Power character. They have a total of 30 hit points. Like the Egg Hammer, they will always have one Power Core not of the leader's type inside them.