The 3rd boss is Onaga Koopa alongside with his son Onaga Jr and their bodyguard Blizzard Midbus.
The 3rd story arc is based on Drum Island Arc (One Piece), but Tiff's little brother is sick because he got a fever, more warmer than before. Tiff fears about hissickness is getting worse when he was 4 years old. But in his 10 old age, Tuff's sickness is more worst than ever. So Mario decided to take him to Snow Land to find the king of Ice Land. Suddenly Onaga Koopa and his crew attacking the village. He got a mission from his younger brother, Bowser to find the 3rd Crystal Star. Mario Bros take Tuff to the castle of Snow land and take him to a bedroom, there're doctors and nurses who are trying to cure Tuff. Meanwhile Onaga Koopa find the castle to conquer the Snow Land and give the Crystal Star for his little brother. Will Luigi, Kirby and Tiff will stop Snow Trio?
Super Mario Bros GT The Grand Adventure (c) Me ~xXKaijuKing91Xx Characters (c) Nintendo, HAL Laboratory and Warpstar INC Onaga Koopa ~OnagaKoopa Onaga Jr ~OnagaKoopaJr
Thanks! And he will. If you wanna see Drum island Arc in One Piece, then I suggest to buy DVD if you wanna know why this story is based on Drum Island Arc.