The Squash Roll Attack (全身ボール攻撃 Zenshin Bōru Kōgeki?) is a move that appears in Sonic Adventure and Sonic Adventure DX: Director's Cut. It is a technique used by Chaos 2, where it turns into a ball and bounces around.
When using the Squash Roll Attack, Chaos 2 morphs its entire body into one giant blob of water and proceeds to bounce around, squashing any foe coming close to it.
In gameplay, the Squash Roll Attack is used during the Chaos 2 boss battle. Should the player get hit with the Squash Roll Attack, they will take damage. The player can thus either run away from the attack, or repel it with a Punch Attack or Spin Attack in order to force it back into its original form.