Bessie Bass

Bessie Bass is a giant Big Bertha with Boss Bass characteristics. She first debuted in Yoshi's Island DS where she haunted Yoshi, Mario and the other Star Children during their youth in the Era of the Star Children. Bessie Bass is set to appear in Alternate Kingdom and Sea Side Adventure as a boss who fights against Mario, Luigi, Yoshi and the others.

The Era of the Star Children
Long ago, Bessie Bass was an ordinary Big Bertha who had no child. Because she had no child, she still possess Boss Bass characteristics. Bessie Bass's strength was extrordinary so she was eventually hired to be a member of the Koopa Troop.

Some years later, she faced her first official opponent, Yellow Yoshi and was transformed into a gigantic Big Bertha by Kamek. But she was defeated by the Yoshi.

The Era of New History
Several years later after her defeat, Bessie Bass was found by the Blaize Army and somehow gotten bigger for unknown reasons. She planned to have her revenge on the Yoshi who defeated her. But several years had already passed.