Sonic Snarl is a Champagne Amigo ability: when she is hurt she may roar, knocking down nearby enemies so she can escape. It gives her a way out of bad fights.
If soldiers gang up on Champagne, she can let out a roar that floors everyone close to her. She then slips away instead of going down.
It is a good safety net that saves revives, and the knockdown gives you free shots at the floored soldiers.
Ancient Survivor
Guapo recovers health over time and revives himself after being downed in combat.
Angrier Bird
Chicharrón's Angry Bird attack knocks enemies to the ground.
Angry Bird
Chicharrón launches himself at an enemy from a distance.
Attention-Seeker
Chorizo distracts enemies so you can sneak past or take them down.