Burt

Burts, also known as Burt Jr.'s or Burt Brothers (alternatively Burt Bros. ), are round, peach-colored enemies with large red noses and blue and white striped pants that go up above their hands. They appear in Super Mario World 2: Yoshi's Island, Yoshi's Island: Super Mario Advance 3, Yoshi's Island DS, Yoshi's Woolly World and Yoshi's Crafted World. Burts attack in pairs. After jumping on its partner, a Burt will get a big boost, and the same goes for a Yoshi if it jumps on a Burt. If one was defeated, the other would jump non-stop, but if one falls into a pit or lava, the other will be motionless forever. Notable Burts include Burt the Bashful, the Big Burt Bros., and Burt the Ball. If defeated, they will give two stars or three coins. They can be disposed with an egg or a ground pound; however, they cannot be eaten. Burt the Bashful and the Big Burt Bros. were originally normal-sized Burts but were made bigger by Kamek.

Super Mario World 2: Yoshi's Island

 * Player's Guide: Follow the Burt! Give up? Then throw an egg at him and he'll cough up three stars.
 * Shogakukan guide: 2匹ひと組で、ピョンピョンはねまわる. ジャンプ力はバツグン. (The two of them jump around in pairs. Their jumping ability is outstanding.)

Yoshi's Island: Super Mario Advance 3

 * Shogakukan guide: 2匹ひと組で、ピョンピョンはねまわる. ふみつけてもつぶれるだけで倒すことはできないが、タマゴやヒップドロップなどで倒せばスターを3つ出す. (They are a pair of two, and they hop around. They cannot be defeated by stepping on them, but they will produce three Stars if they are defeated by an egg or a Hip Drop.)

Trivia

 * Sprites found in the source code of Super Mario World 2: Yoshi's Island prototypes include a smiling, nightcap-wearing creature otherwise closely resembling Burts, but appears to walk normally.