Thunder Sass is a small Hooraw that wears yellow clothing. He also has an angry expression on his face.
The battle conditions for Thunder Sass is that Mario can only win by counterattacking and can only heal during his turn.
- Hooraw Charge: Thunder Sass will bounce off of the group of Hooraws and into Mario. Mario must have his hammer ready to counter this attack.
- Charging Fist: Thunder Sass will dash at Mario attempting to punch him. Mario must jump at the right moment in order to damage him.
Since Mario can only heal and counterattack, Mario must try his best to counterattack all of Thunder Sass' attacks and heal when necessary.