Alan (Spellcaster Flying Monkey)

Dive Attack. If the monkey dives at least 20 ft. strait toward a target and then hits it with a melee weapon attack, the attack deals an extra 3 (1d6) damage to the target.

War Caster. When damaged, the monkey has advantage on Constitution saving throws to maintain concentration on a spell.

Innate Spellcasting. The monkey's innate spellcasting ability is Wisdom (spell save DC 13, spell attack +5), treated as a 6th level spellcaster. He can innately cast the following spells, requiring no material components:

At will: Control Flames, Minor Illusion, Prestidigitation, Shocking Grasp, Shape Water, Thaumaturgy

1st level (4 slots): Absorb Elements, Chromatic Orb, Shield, Thunderwave

2nd level (3 slots): Hold Person, See Invibility

3rd level (3 slots): Call Lightning, Dispel Magic, Hypnotic Pattern

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

Shapechanger. The monkey can use its action to polymorph into an object from tiny to small size or back into its true form. Its statistics are the same in each form, though if the object doesn't have hands or feet, it's walk, swim, and climb speeds become 0. Any equipment it is wearing or carrying is hidden. It reverts to its true form if it dies.

False Appearance (Object Form Only). While the monkey remains motionless, it is indistinguishable from an ordinary object.

Multiattack. Alan is quick and agile allowing him to make two attacks in the time it takes most to make only one.  

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 1 (1d4 – 1) piercing damage.

Lob the Potion Grenade. Ranged Weapon Attack: Alan specializes in potion grenade grenade delivery from the ground, from behind cover or from the air. This can deliver damaging potion effects to adversaries or beneficial effects to allies. +5 to hit, reach 60 ft., area target. 

Teleport (Recharge 4–6). The monkey magically teleports, along with any equipment it is wearing or carrying, up to 40 feet to an unoccupied space it can see. Before or after teleporting, the monkey can make one bite attack.

War Caster. The monkey can cast a single-target spell instead of using an opportunity attack.