Description: Zubat is a poison and flying type creature that relies on echolocation to navigate and find prey. They often live in colonies. They are the most common cave-dwelling Pokémon and any cave-like mystery dungeon with the exception of the Glowstone Labyrinth is sure to have these Pokémon or their evolved forms.
Behaviour: Zubat are nocturnal creatures, going out to hunt during the evening hours and staying in caves during the day. If disturbed from their sleep, they may attack. They sleep very lightly and occasionally appear in large swarms.
Threat Level: Low. The main threat a Zubat poses is its ability to inflict confusion and its advantage in the dark due to its echolocation abilities. Occasionally, a Zubat may know Bite or Wing Attack and that can cause problems for inexperienced fighters, but Astonish, Leech Life and Supersonic are generally the extent of a Zubat's abilities in all but the most dangerous of mystery dungeons. Grass, Bug, Ground, Poison and Fighting-type attacks are virtually useless against this Pokémon, however, so be sure to avoid using these moves if possible. Also, a large swarm of Zubat could easily overwhelm an unprepared team.
General habitat: Zubat are ubiquitous cave-dwellers, although they will very occasionally live in very dark forests.
Description: Golbat is a poison and flying type Pokémon that evolves from Zubat. They are capable of draining their victims of large volumes of blood. Unlike Zubat, Golbat have eyes that are capable of limited vision, but are more likely to use echolocation.
Behaviour: Golbat feed on the blood of their unsuspecting victims, sometimes draining them completely and killing them. They also go out at night to hunt for bugs and other small prey. They sleep for most of the day.
Threat Level: Moderate. A Golbat is easily capable of killing small Pokémon with the amount of blood they consume at once. Their fangs are capable of piercing the hides of the majority of Pokémon species, but they will not feed off of rock, steel, ghost, grass or poison-type Pokémon. They often confuse and poison their opponents in battle, but their attacks are also rather potent and damaging. In the toughest of cave dungeons, they may be able to learn moves such as Mean Look, Air Slash, and Haze.
General habitat: Golbat live in caves, mines, ruins, old buildings, and forests.
Description: Crobat is the final evolution of Golbat, and is exceedingly rare in the wild due to its unorthodox method of evolution. Crobat are capable of evolving when becoming the leader of a colony, when experiencing extreme happiness or elation, when bonding with their trainer, or when opening their eyes to sentience. It is a poison-and-flying type Pokémon with four wings, which means its ability to walk is almost completely gone, but it can fly silently and its speed is almost unmatched.
Behaviour: Wild Crobat are not as greedy as Golbat, but they often take on larger airborne prey as well as rodents and insects. Even in the wild, they are exceedingly intelligent, but they are generally sentient. If they are not the leader of a swarm of Zubat and Golbat, they tend to live in solitude. Sentient Crobat are very friendly and wise creatures despite their menacing appearance, but they are still nocturnal and enjoy hunting immensely.
Threat Level: If they are wild and hungry, or leading a swarm, they are exceedingly deadly. These Pokémon are not only blindingly fast, they are powerful attackers and much more resilient to attacks than their unevolved brethren. They can often take out a Pokémon completely silently and kill it, and its teeth and wings are capable of tearing Pokémon to shreds. Your best bet in battle is to lower its speed or otherwise cripple it, but keep in mind that it is immune to poisoning. Electric, psychic and ice attacks all work well, and it is generally incapable of battling steel-type Pokémon.
General habitat: Wild Crobat live in caves, forests, old buildings, or ruins, but sentient Crobat can be found anywhere close by what it considers to be a suitable hunting ground.