A larger version of a Bullet Bill, known in Japanese as Magnum Killer. Aside from the size, the common main differences is that the Banzai Bill has a visible mouth with sharp teeth and lacks arms.

Renamed in English as Boomer Bill for the LEGO Super Mario Boomer Bill Barrage Expansion Set in 2020, and renamed again as Bomber Bill on the official Super Mario World website on the Mario Portal in 2022. The Bomber Bill rename is seemingly being kept for the foreseeable future, with its usage in the The Super Mario Bros. Movie in 2023 and Super Mario Party Jamboree in 2024.

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