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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 alongside Chain Chomps, and has four battles. The first battle has two Chain Chomps at the front, two Parabones in the middle, and three Dry Bones at the back; a third Parabones first officer, and a Dry Bones acts as 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 and five Dry Bones at the back, with a third Parabones as first officer and a Chain Chomp as captain. The fourth and final battle has four Mechakoopas at the front (one of which is infected with Malatone Formula:X), along with three Dry Bones, a Chain Chomp as first officer, and a Dry Bones as captain.