Keen Senses. The pseudodragon has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.
Magic Resistance. The pseudodragon has advantage on saving throws against spells and other magical effects.
Limited Telepathy. The pseudodragon can magically communicate simple ideas, emotions, and images telepathically with any creature within 100 feet of it that can understand a language.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 3) piercing damage.
Sting. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 4 (1d4 + 3) piercing damage, and the target must succeed on a DC 11 Constitution saving throw or become poisoned for 1 hour. If the saving throw fails by 5 or more, the target falls unconscious for the same duration, or until it takes damage or another creature uses an action to shake it awake.
Fire Breath (Recharge 3–4). The pseudodragon exhales fire in a 20-foot cone. Each creature in that area must make a DC 16 Dexterity saving throw, taking 7 (2d6) fire damage on a failed save, or half as much damage on a successful one.