Shapechanger. The cat can use its action to polymorph into a tiger or into a tiger, or back into its true form, which is tiger. 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 tiger has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pounce (Tiger or Hybrid Form Only). If the tiger moves at least 15 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone. If the target is prone, the tiger can make one bite attack against it as a bonus action.

Telepathy.You create a telepathic link between yourself and a willing creature with which you are familiar. The creature can be anywhere on the same plane of existence as you. The spell ends if you or the target are no longer on the same plane.
Until the spell ends, you and the target can instantaneously share words, images, sounds, and other sensory messages with one another through the link, and the target recognizes you as the creature it is communicating with. The spell enables a creature with an Intelligence score of at least 1 to understand the meaning of your words and take in the scope of any sensory messages you send to it.

Bite (Tiger Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing damage. If the target is a humanoid, it must succeed on a DC 13 Constitution saving throw or be cursed with weretiger lycanthropy.

Claw (Tiger or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage.