Dire Chihuahua (5e Creature)
From D&D Wiki
Small beast, chaotic evil
Pack Scare Tactics. The chihuahua 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. The chihuahua also has advantage on attack rolls against creatures that are frightened.
Multiattack. The dire chihuahua can use its Frightful Presence. He then makes a bite attack.
Bite. Melee Weapon Attack +1 to hit, Reach 5ft., one target. Hit: 7 (2d4+2) piercing damage
Frightful Presence. Each creature within 30 feet of the feet of the dire chihuahua and aware of it must succeed on a DC 20 Charisma saving throw or become frightened. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends, the creature is immune to this effect for the next 24 hours.
A dire chihuahua is a terrifying creature packaged into a small sack of fur, flesh and bone. However, unlike normal dire creatures, the dire chihuahua retains a lovable property and can charm as well as frighten. It resembles a normal chihuahua, with a nice thick coat, sharp little canines, and big eyes. Its true nature is revealed when it is hungry and no food is around but living prey, at which it will lunge with horrifying ferocity.
While its intelligence score is low, it is capable of understanding rudimentary commands like that which is given to domesticated. Dire chihuahuas, as opposed to being entirely mean and animalistic, is able to be kept as a companion, provided it is well cared for, fed, groomed, etc. But it does not easily reciprocate this care, and can still turn on the hand which feeds it at a moment's notice.