TYPE: Turtle, Boss.
CLOSE RELATIVES: Clubba.
SKILLS AND ATTACKS: He can boost his attack and defense whenever he wants to.
STRENGTHS: Ground pound and Punch.
Macho Grubba was a weak Tubba Blubba until he found a Crystal Star and built a battle arena and trained people to become champions, but then he took them to the Crystal Star and drained their energy with it.
Mario and friends came and defeated Macho Grubba, saving the champions whose energy he had stolen. He will never be seen again.