Bug-type
Bug-type Pokémon are generally arthropod-like Pokémon, mostly insectoid and a few arachnids. These Pokémon commonly evolve at low levels and as such are ideal for the early stages of the games. Bug-type moves involve use of the bugs' body parts. Bug Pokémon are generally regarded as weak due to the first generation's Bug types having low stats and the first generation's Bug type moves being weak, but some can be quite powerful, like Heracross. Bug types are weak against Fire, Flying, and Rock types, yet are strong against Grass, Psychic, and Dark types.
Dark-type
In the Japanese version, this type is called Evil. According to most Pokédex information, Dark type Pokémon tend to have bad reputations and an evil nature about them. Dark-type Pokémon are known for using sinister moves such as biting and stealing. Examples of Dark-type Pokémon include Tyranitar, Absol, Mightyena, Umbreon, Houndoom, Sneasel and especially Murkrow for reasonable reasons. Certain species of Pokémon classified as "Dark" seem to be misunderstood, such as Absol, who has gathered a reputation of bad luck, always appearing at human towns when a natural disaster is about to happen, when really, it tries to warn the humans. Dark type Pokemon are strong against Psychic and Ghost types, however are weak against Fighting, Bug, and Fairy types.
Dragon-type
Dragon-type Pokémon are, quite simply, dragons. Their moves involve the use of claws and breath. They are one of only two types, the other being Ghost, to be Super Effective against its own type. Not all dragon-like Pokémon are Dragon-type Pokémon; for example, Charizard is a Fire/Flying type, Gyarados is a Water/Flying type, Lapras is a Water/Ice type, Aerodactyl is a Rock/Flying type, Steelix is a Steel/Ground type, Tyranitar is a Rock/Dark type, Sceptile is a pure Grass type, Aggron is a Steel/Rock type, and Milotic is pure Water type, but a select few are in the Dragon breeding group (Charizard, Milotic, Gyarados, and Sceptile).
Electric-type
Electric-type Pokémon have electricity-oriented powers. Electric types often have a high Speed stat, a respectable Special Attack, and a decent Special Defence. Electric types are also noted for very few weaknesses-Although the 1 weakness they have is possibly the 2nd most common. Some examples include Pikachu, Elekid, Raichu, Manectric, Ampharos, Raikou, Plusle, Minun, and Electrode.
Many Electric-type attacks have a chance of causing Paralysis, a status effect which severely reduces the affected Pokémon's Speed, and means a 25% chance of being unable to move each turn. Some Electric-type moves that Pokémon can learn are ThunderShock, Shock Wave, and Spark.
Fighting-type
Fighting-type Pokémon learn specifically labelled fighting melee attacks, such as punches and kicks. Examples include Hitmonlee, Hitmonchan, Hitmontop, Lucario, Hariyama, Mankey, and Machoke. Some Fighting-type moves that Pokémon can learn are Seismic Toss, Hi Jump Kick, and DynamicPunch.
Fire-type
Fire-type Pokémon are aligned with heat, often in the form of flames or lava. Examples include Vulpix, Magmar, Charmander, Cyndaquil, Torkoal, Moltres, Torchic, Entei, Chimchar.
Fire-type attacks may cause a Burn, a status effect which causes a reduction in the victim's Attack statistic as well as reducing hit points each turn. Fire-type Pokémon are immune to the Burn status effect (unless caused by Tri Attack). Some Fire-type moves that Pokémon can learn are Fire Spin, Fire Blast, and Flamethrower.
Flying-type
Flying-type Pokémon are Pokémon that fly or resemble birds. They are normally bird-like or dragon-like Pokémon, but there are exceptions, such as the Sea serpent-like Water-and-Flying-type Gyarados. The Flying-type has never been any species's sole type - except for Tornadus, and Arceus when holding the Sky Plate. Most Flying-type Pokémon are dual-types, most of the common ones being dual Normal- and Flying-type. Examples include Pidgey, Fearow, Doduo, Noctowl, Swellow and Farfetch'd.