Who would win monsters or aliens?

It is not possible to definitively say who would win in a battle between monsters and aliens, as the outcome would depend on a variety of factors, such as the specific types of monsters and aliens involved, their powers and abilities, and the strategies they employ. Some monsters, such as dragons, are incredibly powerful and could potentially defeat many aliens, while some aliens, such as advanced extraterrestrials with superior technology, could potentially defeat many monsters. Ultimately, the outcome of a battle between monsters and aliens would depend on the specific circumstances of the encounter.