Alfa Pseudodragon

Keen Senses: Grants advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Shapechanger. The pseudodragon can use its action to polymorph into a beast form that resembles a fish (quipper) (speed 20 ft.), a hawk (20 ft., fly 60 ft.), or a lizard (20 ft., climb 20 ft.), or back into its true form. Its statistics are the same in each form, except for the speed changes noted. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Magic Resistance. The Pseudodragon has advantage on saving throws against spells and other magical effects.

Sting (Bite in Beast Form). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit 1d4 + 2 piercing damage, and the target must succeed on DC 11 Constitution saving throw or take 5 (2d4) poison damage and become poisoned for 1 minute. The target can repeat its saving throw at the end of each of its turns, end the effect on a success.

Invisibility. The Pseudodragon magically turns invisible until it attacks or until its concentration ends (as if concentrating on a spell). Any equipment the Pseudodragon wears or carries is invisible with it.