Clifford the Big Red Dog

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

Pack Tactics. The wolf has advantage on an attack roll against a creature if at least one of the wolf's allies is within 5 feet of the creature and the ally isn't incapacitated.

Good Boy Protection. If Clifford has any creature charmed and receives damage, the charmed creature will become enraged and will protect Clifford to protect their good boy. The creature must use their reaction to attack. 

Multiattack. The Clifford the Big Red Dog makes three attacks: Two with its bite and one with its tail or a stomp. 

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 16 (3d6 + 6) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Stomp. Melee Weapon Attack: +10 to hit, reach 5 ft., one prone creature. Hit: 27 (4d10 + 6) bludgeoning damage.

Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 20 (3d8 + 6) bludgeoning damage.

Puppy Dog Eyes. One humanoid the fiend can see within 30 feet of it must succeed on a DC 15 Wisdom saving throw or be magically charmed for 1 day. The charmed target must use all of its motion to get closer to Clifford and take its action to pet Clifford. If the target suffers any harm,  it can repeat the saving throw, ending the effect on a success. If the target successfully saves against the effect, or if the effect on it ends, the target is immune to this fiend's Charm for the next 24 hours.

Clifford can have unlimited charmed targets.