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

Magic Resistance. The flying monkey has advantage on Saving Throws against Spells and other magical effects.

Bite. Melee Weapon Attack: +1 to hit, reach 5 ft., one target. Hit: 1 (1d4-1) piercing damage.

Healing Touch (1/day). The flying monkey touches another creature. The target magically regains 1d4+2 hit points and is cured from the poisoned condition. 

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