Bat

A Bat is a recurring type of enemy in the  series. In terms of strength bat-type enemies are weak and pose little threat alone, but they often attack in numbers. Their trademark ability is to absorb the HP from their targets with attacks like Drain and Vampire, and using sound-based attacks. Some bat-type enemies also count as undead. Common variations of bat include the Vampire Bat and Poison Bat.

In Super Smash Flash 2
In Super Smash Flash 2, multiple bats appear as background characters, on Chaos Shrine, flying around the roof of the stage; unlike in their main series, though, they do not attack the players in any occasion.