From the Super Mario Wiki
Shiny Bob-ombs are species of Bob-omb that appears in Paper Mario: Sticker Star. They resemble a normal Bob-omb, except they have an added sheen to their body, similar to those of the shiny stickers. Two Shiny Bob-ombs appear inside Bowser's Snow Fort, and can be encountered assisting an Ice Bro and Shy Guy. Just like normal Bob-ombs, Shiny Bob-ombs attack by ramming into Mario. If Mario damages a Shiny Bob-omb either during the battle or performing a First Strike on one, its fuse will be lit, and it will automatically explode when it comes in contact with Mario.
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