Every once in a while, you'll see a Golbat that's missing some fangs. This happens when hunger drives it to try biting a Steel-type Pokémon.
They can suck down over 10 ounces of blood in one go. They have been known to drink so much blood that they can no longer fly.
It sinks its sharp fangs into other creatures and slurps up their blood. A closer look at the fangs reveals that they are hollow and akin to straws.