The Energy Ball Attack (エネルギー攻撃 Enerugī Kōgeki?) is a move that appears in Sonic Adventure and Sonic Adventure DX: Director's Cut. It is an attack used by the Egg Viper, wherein it fires a large ball of energy.
When using the Energy Ball Attack, the Egg Viper opens up its shields and will charge up an energy ball before firing it.
In gameplay, this technique is used during the Egg Viper boss battle. When preparing to use this attack, the Egg Viper's shields will be brought down to charge the attack. However, this attack can be prevented by using the Homing Attack to interrupt its completion. If the player is hit by this attack, they will take damage.