Dark Boomerang Bro
From the Super Mario Wiki, the Mario encyclopedia
Dark Boomerang Bros. are the pitch-black counterparts of Boomerang Bros. that can be found in the Flopside Pit of 100 Trials, in Super Paper Mario. Apart from being completely black, the differences between the Dark and ordinary Boomerang Bros. are not very great. Both species have the same attack pattern: they keep throwing boomerangs at Mario and his allies.
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