Description: Rattata is probably the most common Pokémon you will find in the world. Originating in the human regions of Kanto and Johto, this hardy vermin has spread across the globe due to their incredible adaptability and reproduction rate, but their lifespans are very short in comparison to a majority of Pokémon. It is a normal-type Pokémon.
Behaviour: Outside of mystery dungeons, Rattata are generally timid creatures who prefer scavenging food to fighting, but they may turn territorial if you attack their nest. In mystery dungeons, Rattata are slightly more brazen and territorial, but they also tend to be nocturnal.
Threat level: Low. Any Pokémon that has learned to battle is probably capable of taking on most feral varieties of this Pokémon; however, they are adept thieves and are unafraid of stealing food if they don't think you'll be able to see them. Rattata may pose a challenge to inexperienced dungeon-crawlers due to their speed, large fangs and ferocity. Their abilities can either be Run Away, which causes them to flee at the first sign of danger, or Guts, which means that those crippled by status ailments will have much stronger attacks. It is best to just directly attack them; they are not capable of taking much damage.
General habitat: These Pokémon can be found almost anywhere, including caves, forests, grasslands, abandoned buildings and cities, ruins, or wetlands. Habitats with lots of predatory bird Pokemon
Rattata are also surprisingly adept swimmers, but they are not capable of battling while swimming.
Description: Raticate are the evolved forms of Rattata, which have much more developed fangs and are slightly quicker than their unevolved forms. They have sandy brown fur and long thin tails. They are also capable of standing on their hind legs. Raticate are even more adaptable and hardy than Rattata. They are normal-type Pokémon as well.
Behaviour: These Pokémon are vicious and territorial regardless of whether they live in a Mystery Dungeon, but if they have the ability Run Away they may flee from battle if they are injured enough. They are much less cautious and more carnivorous than Rattata, and many are active in the daylight as well as during the night. They attack with speed, fangs, and tackling attacks.
Threat level: Medium. These Pokémon are capable of gnawing through concrete and steel with their teeth. They have the same abilities as Rattata, which means they may flee from battle if injured enough, but they are strong and fast enough to take on most inexperienced Pokémon. Exercise caution with them in battle, they use ramming and biting attacks but are also capable of learning Swords Dance, Sucker Punch and Scary Face. Ranged attacks, fighting-type attacks and speed attacks work wonders. Status afflictions should be avoided in case their ability is Guts, which will increase their physical attack power.
General habitat: Basically any land habitat is normally suitable for this Pokémon except for the most extreme of temperatures and heights. If a habitat has many predatory birds or Pokémon such as Luxray, Serperior, Arbok, Seviper, and Zangoose, these Pokémon are almost sure to be found.