From the Super Mario Wiki, the Mario encyclopedia
The Bob-omb Cannon is the special item of King Boo (Luigi's Mansion), Black Shy Guy, Mario (Happi), Wario (Hiker), Builder Toad, and Dry Bowser (Gold) in Mario Kart Tour. When used, it appears on the front of the player’s kart and shoots out three Bob-ombs in front of it. During a Bob-omb Cannon Frenzy, Bob-ombs surround the player.
Mario Kart Tour
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