Brute. A melee weapon deals one extra die of its damage when the bugbear hits with it (included in the attack).
Surprise Attack. If the bugbear surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 7 2d6 damage from the attack.
Morningstar. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 11 2d8+2 piercing damage.
Javelin. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 9 2d6+2 piercing damage in melee or 5 1d6+2 piercing damage at range.