Everything a bear brings, packed into a person. Brown Bear hands Bearhead the muscle, the toughness, the sharpened senses, and the claws of the animal it names, a close-range Mutant Quirk that exists outside the main story in game material only.
Brown Bear, given in Japanese as Higuma, is the Quirk carried by Bearhead. It is a Mutant type built for close-range fighting.
The ability is not canon to the manga or anime. It originates in game material, and the wiki files it under non-canon Quirks, game original Quirks, and villain Quirks. No manga chapter or anime episode debut is recorded for it.
The Quirk hands its owner the traits of a bear across the board. Strength climbs well past human range, durability comes with it, and the user's senses sharpen considerably. Large claws, sharp enough to matter in a fight, round out the package.
Two named Super Moves belong to it. Roar of the Beast, given in Japanese as Yajū no Hōkō, and Fatal Wound, rendered as Chimeishō, both appear in game material.

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Brown Bear is a Mutant type Quirk belonging to Bearhead, a villain who only appears in game material rather than the main manga or anime.
Brown Bear gives Bearhead the traits of a bear, including strength and durability well past human range, sharpened senses, and large claws sharp enough to use in a fight.
No, Brown Bear is not canon to the My Hero Academia manga or anime. It originates from supplementary game material.
Bearhead is the sole known user of Brown Bear, and both the character and the Quirk exist only within game continuity.
Bearhead has two named Super Moves tied to Brown Bear in game material, Roar of the Beast and Fatal Wound.
Looking for more on Brown Bear? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
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