Werecheetah

Shapechanger. The werecheetah can use its action to polymorph into a cheetah-humanoid hybrid or into a cheetah, or back into its true form, which is humanoid. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Keen Hearing and Smell. The werecheetah has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Multiattack (Humanoid or Hybrid Form Only). In humanoid form, the werecheetah makes two javelin attacks. In hybrid form, it makes two attacks, only one of which can be a bite.

Bite (Cheetah or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 3) piercing damage. If the target is a humanoid, it must succeed on a DC 11 Constitution saving throw or be cursed with werecheetah lycanthropy.

Claws (Cheetah or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage.

Javelin (Humanoid or Hybrid Form Only). Melee or Ranged Weapon Attack: +3 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 4 (1d6 + 1) piercing damage.

Swift. The werecheetah can take the dash or disengage action.