Brawny Muscle

Brawny Muscle (筋肉のマッソー, Kinniku no Massō) was a ninja from the Ninja Village. He was from the 40th graduating class, and a member of the Heavenly Ninja Party.

Ninjas Arc
He and the rest of his group attack Sonic and Flash. During the attack, he breaks Sonic's sword with his fist only for Sonic to break his skull with a single straight punch, killing him.

Abilities and Powers
As a graduate of The Village and a member of the Heavenly Ninja Party, Brawny Muscle is a very powerful ninja. However, he was still below the likes of Speed-o'-Sound Sonic, who was able to handle his most powerful attacks and had his neck broken with a single elbow to the head.

Physical Abilities
Immense Strength: Brawny Muscle has formidable strength. His muscular build and emphasis on raw power suggest he is physically stronger than most of the other members of the Heavenly Ninja Party. While his special attack managed to break Sonic's sword, it was not able to significantly harm him.

Immense Speed and Reflexes: As a ninja of the Ninja Village, Brawny Muscle has impressive speed and reflexes. Alas, he was unable to react to Sonic's elbow to his head, which ultimately killed him.

Fighting Style
Ninjutsu Master: As a graduate of The Village, Brawny Muscle is a very skilled ninja. Unlike most other ninjas of the Heavenly Ninja Party, Brawny Muscle relies more on physical strength and does not carry weapons.
 * Hard Destruction Fist: Brawny Muscle unleashes an immensely powerful punch at his opponent. This attack was viewed as "a slight shove" compared to Saitama's punches by Sonic, who was undamaged by it.