Monkeys

Nuisance: Monkeys always occupy the same space as whichever foe they are distracting.  Monkeys move whenever their target moves, and monkeys can stand on any space their target occupies, including ladders.  If their target flies or enters hazardous terrain that would kill the monkey, the monkey dies.  If their target suffers fall damage, monkeys receive the damage as their target.

Tiny: This unit may occupy a space even when it is already occupied by another unit, and it does not impede other units' ability to travel over spaces on which this unit rests.  Furthermore, it is capable of walking on upper levels despite being a beast.