Abduct. The bugbear needn't spend extra movement to move a creature it is grappling.
Grab. Melee Attack Roll: +4, reach 10 ft. Hit: 9 (2d6 + 2) Bludgeoning damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 12).
Light Hammer. Melee or Ranged Attack Roll: +4 (with Advantage if the target is Grappled by the bugbear), reach 10 ft. or range 20/60 ft. Hit: 9 (3d4 + 2) Bludgeoning damage.