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The Superbombomb is a weapon the Shadow Sirens plan to use against Mario and his teammates in Paper Mario: The Thousand-Year Door. Beldam puts the weapon together, but she loses it and blames Vivian for it, threatening to punish her if she doesn't find it. After Doopliss robs Mario of his identity and partners, Mario finds this item (which was broken from when Beldam dropped it) for Vivian, who then joins his party.
During Bowser's event at the ending of Chapter 5, Bowser and Kammy Koopa find Lord Crump in Twilight Town and demand to know everything he knows about Mario and his team, as well as the Crystal Stars. A face-off begins between the two parties of Lord Crump and the X-Nauts and Bowser, Kammy, and the Koopa Troop. When Crump and the X-Nauts begin to attack the Koopas using this item, it is defective, but Bowser's fiery breath sets it off, defeating both armies.
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