The Mushroom Bomb has the appearance of a nuclear bomb, similar to that of the real-life "Fat Man" bomb, detonated during World War II. The bomb's explosion cloud is also similar in shape to those created by real-world nuclear weapons (and also any conventional, non-nuclear weapons which create large enough explosions), with its distinctive mushroom shape. However, this cloud is different in that it glows a deep green and is filled with many skull shaped howling souls.