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Bone Storm is a level in Bowser's Castle in the Bowser Jr.'s Journey mode of Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey.
The level consists of mostly Dry Bones and Parabones and has four battles. The first battle has two Chain Chomps at the front, two Parabones in the middle, three Dry Bones at the back, a Parabones first officer, and a Dry Bones captain. The second battle has the same exact formation as the first, although one of the Parabones troops is infected with Malatone Formula:X. The third battle has two Parabones at the front, five Dry Bones at the back, a Parabones first officer, and a Chain Chomp captain. The fourth and final battle has four Mechakoopas at the front with one of them being infected with Malatone Formula:X, three Dry Bones, a Chain Chomp first officer, and a Dry Bones captain.