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Peacemaker,

Nebulon. Transforms into the weapon of Pointblank.

Perceptor,

Autobot Scientist. Transforms into a (real-working) microscope.

Phaser,

Autobot Micromaster. Transforms together with Blast Master into a space shuttle. He is a member of the Astro Squad.

Pinpointer,

Nebulon. Transforms into the weapon of Crosshairs.

Pipeline,

Autobot Micromaster. Transforms together with Gusher into a construction vehicle. Together they operate the Tanker Transport.

Pipes,

Autobot. Transforms into a car. He is one of the Mini-Vehicles.

Piranacon,

This Transformer is a Gestalt, formed by five Seacons. The sixth Seacon transforms into Piranacon's weapon.

Piranha,

Autobot from the second generation. Transforms into a raceboat. He is one of the Rotorbots.

Planes,

See Decepticon Planes.

Pointblank,

Autobot. Transforms into a car. In The Rebirth, part 2 his weapon was modified into a exosuit for Peacemaker. Due to this proces, he became a Targetmaster.

Polar Claw,

Maximal. Comes from the Beast Wars. Transforms into a polar bear.

Pounce,

Decepticon. Transforms into a jaguar. He is one of the two Decepticon Clones.

Powerdasher,

Autobot. Transforms into a jet. He is not a member of any group. He was only available by mailorder, just as the Omnibots.

Powerflash,

Autobot Actionmaster. His missile launcher transforms into his battle armour.

Powerglide,

Autobot. Transforms into a plane. He is one of the Mini-Vehicles.

Powermasters,

These Transformers have all a Nebulon partner which transforms into their engine. Without this engine they aren't able to transform. The Autobot Powermasters are:
Getaway
Joyride
Optimus Prime
Slapdash
The Decepticon Powermasters are:
Darkwing
Doubledealer
Dreadwind

Powermasters, 2nd generation,

Group of four Transformers from the second generation. They have no relation with the Powermasters from the first generation (except for the name). All four have mechanisms that allow them move around. Their names are:
Bulletbike, Decepticon
Ironhide, Autobot
Meanstreak, Autobot
Staxx, Decepticon

Power Punch,

Decepticon Micromaster. Transforms together with Direct-Hit into a military vehicle. He is a member of the Battle Squad.

Power Run,

Autobot Micromaster. Transforms together with Strike Down into a hoovercraft. He is a member of the Metro Squad.

Powertrain,

Autobot micromaster. Transforms into a truck. He is a member of the Off Road Patrol.

Predacons,

Group of five Decepticons. Together they transform into Predaking. Their names are:
Divebomb
Headstrong
Rampage
Razorclaw
Tantrum

Predacons,

The "bad" guys in the Beast Wars. Click HERE to see the names of all the Predacons.

Predaking,

This Transformer is a Gestalt, formed by the five Predacons.

Predators,

Group of Decepticons. In some countries they are called Scope Masters. All the relevant information on this group you can find there.

Predators,

The "bad" guys in the Beast Wars. The US name of this group is Predacons, in Japan they are still called Destrons.

Pretenders,

Group of Transformers that have a protective casing to hide in. The Decepticon casings resemble animals/monsters, the Autobot casings resemble humans. See also Mega Pretenders, Pretender Beasts, Pretender Classics, Pretender Figures, Pretender Vehicles and Ultra Pretenders.
The Autobot Pretenders are:
Cloudburst
Groundbreaker
Landmine
Sky High
Splashdown
Waverider
The Decepticon Pretenders are:
Bomb-Burst
Bugly
Finback
Iguanus
Skullgrin
Submarauder

Pretender Beasts,

Group of robots that transform into animals, they all have a protective casing to hide in. These casings resemble the animals that they transform in.
The Autobot Pretender Beasts are:
Catilla
Chainclaw
The Decepticon Pretender Beasts are:
Carnivac
Snarler

Pretender Classics,

Four Transformers from the 1985 series are remade into Pretenders. Their names are:
Bumblebee
Grimlock
Jazz
Starscream

Pretender Figures,

Group of six Transformers, each has a protective casing to hide in. Their names are:
Bludgeon
Doubleheader
Longtooth
Octopunch
Scorpion
Stranglehold

Pretender Vehicles,

Two Transformers that have a car to hide in. All other Pretenders also fit in their cars. Their names are: Gunrunner and Roadgrabber.

Primacron,

Primacron is the creator of both Unicron and Tornatron. He only appears in Call Of The Primitives.

Primus,

Primus created the Transformers in the comic books. He and Unicron are sworn enemies. Primus trapped both Unicron and himself inside two astroids. Unicron made his astroid into a planet capable of transforming into a giant robot. Primus shapped his astroid into Cybertron, also he created the Transformers. In #75 Unicron arrived at Cybertron and the Transformers united to destroy him.

Protectobots,

Group of five Autobots. Together they transform into Defensor. They were all released for a seecond time in the second generation. Their names are:
Blades
First Aid
Groove
Hotspot
Streetwise

Prowl,

Autobot Actionmaster. His motorcycle transforms into a little battle station.

Prowl,

Autobot. Transforms into a police car. He is one of the Autobot Vehicles.

Prowl,

Autobot. Second release of Prowl. He is one of the Heroics.

Prowl,

Maximal. He is part of the Magnaboss 3-pack together with Silverbolt and Ironhide. Transforms into a lion

Prowl,

Machine wars. Transforms into an indy 500 racer. He has the same shape as Mirage.

Punch/Counterpunch,

Autobot. Transforms into a car. His Autobot name is Punch, but he can disguise himself as a Decepticon: Counterpunch. He only appears in The Rebirth. Go to Counterpunch to see his picture in Decepticon-mode.