Boss Sumo Bro

Boss Sumo Bro. is the enlarged Sumo Bro. who first debuted in New Super Mario Bros. U. He is one of the game's mid-bosses along with Boom Boom and Kamek. He is only fought in Screwtop Tower.

New Super Mario Bros. U
In New Super Mario Bros. U, Boss Sumo Bro. awaits in his tower after the defeat of Boom Boom. Boss Sumo Bro. was a regular Sumo Bro. until Kamek transforms him, changing his appearance and size.

In battle, Boss Sumo Bro. jumps on every platforms of the room, stomping it to make electric waves below him in attempt to damage Mario. Stomping the ground makes Mario tremble for a few seconds. Sometimes, he stomps the floor two times.

To defeat him, Mario has to jump and hit the platform where Boss Sumo Bro. stands on, causing him to fall on his shell. While stunned, Mario has to jump on him. He has to do this three times to defeat him. Note Blocks are quite useful for this. It is impossible to stomp on his head because of his spike.

Physical Appearance
Boss Sumo Bro. has the same appearance to that of a regular Sumo Bro., except that he wears two towels on his shoulders, his eyes appeared to be dash-like and slanted, and he is larger than the average Sumo Bro..

Trivia

 * Boss Sumo Bro. is the only boss that does not appear on top of the Tower in the world map.