The Shockwave Attack (振動波攻撃 Shindōha Kōgeki?) is a move that appears in Sonic Adventure and Sonic Adventure DX: Director's Cut. It is an attack used by the Egg Walker, where it creates shockwaves by stomping.
When using the Shockwave Attack, the Egg Walker lifts its legs and stomps down, creating short-ranged shockwaves around its feet.
In gameplay, this attack is used during the Egg Walker boss battle. Should the player get hit by this attack, they will take damage. To avoid this attack, the player must either simply stay out of the range of the shockwaves or use Tails' Propeller Flight to avoid them altogether. After using the Shockwave Attack, the Egg Walker's feet will become vulnerable to Tails' attacks, allowing the player to topple the mech.