Sumo Bros. are large enemies that appear in Super Mario World, New Super Mario Bros. U, & Super Mario Party that will stomp their feet on the ground and fire will erupt on the platform under the platform they are on. These characters can only be killed by swinging Mario's cape, a Starman, or a Koopa shell. These dangerous enemies are very rare to encounter. They only appear in two levels. They are called 'Sumo' Bros. because they are considerably large, and look a little like the Hammer Bros.. They also appeared in the Super Mario World TV show. There also exist in New Super Mario Bros. U and in New Super Luigi U in the second tower of Rock Candy Mines, that has for a boss a giant Sumo Bro.
These foes are usually encountered on platforms that can be jumped against. When he uses his elemental attack, he will wait a bit before striking again, so this is your chance to jump into his platform to defeat it. Use the same strategy with the boss sumo Bro in rock candy mines to topple it over and stomp it. The boss sumo Bro has 3 hits.