1. Squirtle
   Rattata
2. Spearow
   Arbok

Squirtle, whose appearance resembles that of a turtle, is a Water-type Pokémon which later on evolves to Wartortle.

1. Muk
   Voltorb
2. Marowak
   Horsea

Muk is the evolved form of Grimer and is noted for its large, amorphous, purple sludge body which is constantly leaking deadly toxins.

1. Magmar
   Golbat
2. Butterfree
   Geodude

As its name suggests, Magmar is a Fire-type Pokémon which, after evolving from Magby, later on evolves into Magmortar.

1. Tangela
   Slowbro
2. Starmie
   Onix

Violet in color, this starfish-like Pokémon is water/psychic type and is characterized by its jewel core which glows in seven colors.

1. Kadabra
   Metapod
2. Rattata
   Exeggutor

The Exeggutor is a grass/psychic type Pokémon which, due to its sturdy body and three to six round yellow heads, bears a strong resemblance to a palm tree.

1. Diglett
   Tentacruel
2. Jigglypuff
   Sandslash

This jellyfish-like Pokémon is characterized by its blue coloration with two large crystal spheres and up to eighty tentacles, most of which are hidden.

1. Beedrill
   Weezing
2. Vileplume
   Poliwrath

Weezing, which evolves from Koffing, is a Poison-type Pokémon noted for its two different-sized spherical heads from which poison is expelled.

1. Pinsir
   Arbok
2. Nidorina
   Beedrill

The Pinsir, though it is not known to evolve from or to any other form, is a Bug-type Pokémon which, using the Pinsirite Mega Stone is capable of evolving into Mega Pinsir.

1. Cubone
   Poliwrath
2. Voltorb
   Tauros

Tauros is a male-only bovine-like Pokémon species which is considered to be the counterpart to the female-only species, Miltank.

1. Dewgong
   Weepinbell
2. Blastoise
   Marowak

As the final form of Squirtle, Blastoise retains its blue skin, but develops a tough, brown shell with two powerful cannons protruding from the sides.

1. Electabuzz
   Jynx
2. Golbat
   Slowbro

This Electric-type Pokémon is the second form of Elekid and is easily recognized by its yellow fur with black patterns, particularly a lightning bolt-shaped stripe on its chest.

1. Butterfree
   Rattata
2. Dragonite
   Vileplume

This dragon/flying type Pokémon is the final form of Dratini and is characterized by its small wings and bulky body.

1. Weepinbell
   Diglett
2. Arcanine
   Dewgong

Arcanine, which evolves from Growlithe, is a Fire-type Pokémon noted for its distinct orange coating, decorated with jagged black stripes.

1. Golem
   Kakuna
2. Beedrill
   Arbok

As the final form of Geodude, this tortoise-like rock-type Pokémon develops a round hollow shell which is composed of plated, green rocks.

1. Parasect
   Spearow
2. Cubone
   Marowak

Parasect is an insectoid Pokémon characterized by the large, parasitic mushroom on its back which significantly drains it of nutrients.

1. Sandslash
   Jigglypuff
2. Nidorina
   Electrode

This round Electric-type Pokémon is identified by its unique appearance which resembles that of a reverse-colored Poké Ball.

1. Rattata
   Ditto
2. Clefairy
   Onix

Ditto is a magenta or light-purple free-form blob which has the ability to mimic the appearance and ability of any physical object.

1. Spearow
   Clefairy
2. Kakuna
   Mewtwo

Characterized by its gray and purple color scheme, this legendary Pokémon is the result of DNA engineering experiments done on the Mew.

1. Diglett
   Weepinbell
2. Slowbro
   Rhydon

Rhydon is the second form of the Rhyhorn, which displays physical characteristics of both rhinoceroses and dinosaurs.

1. Kadabra
   Metapod
2. Geodude
   Seaking

This large, fish-like Pokémon is identified by its round, orange body with black-speckled fins, and a powerful horn protruding from its forehead.

1. Rapidash
   Clefairy
2. Spearow
   Psyduck

Psyduck, which evolves to Golduck, is a Water-type Pokémon noted for its dimwitted behavior and an inability to think clearly due to frequent headaches.

1. Butterfree
   Tangela
2. Ninetales
   Voltorb

As its name suggests, this Fire-type Pokémon sports nine thick tails tipped with pale orange along with luxurious golden-white fur.

1. Sandslash
   Nidorina
2. Jigglypuff
   Charizard

As the final form of Charmander, this dual fire/flying type Pokémon takes on the appearance of a bipedal dragon with sharp claws and teeth.

1. Vaporeon
   Sandslash
2. Geodude
   Dewgong

Using the water stone, this Pokémon becomes one of Eevee's eight final forms and is depicted with fish-like features including fins and a tailfin.

1. Weepinbell
   Rapidash
2. Golduck
   Dewgong

Golduck is a blue, bipedal, Water-type Pokémon and the evolved form of Psyduck; it has a red gem on its forehead which glows when using its psychic abilities.

1. Rapidash
   Poliwrath
2. Golbat
   Arbok

Poliwrath, which evolves from Poliwag using the water stone, is identified by its blue coloration, bulbous eyes and a white belly decorated with a black swirl.

1. Rattata
   Maneton
2. Nidorina
   Vileplume

This electric/steel Pokémon is usually the result of three Magnemites which are fused together by a strong magnetic force.

1. Gyarados
   Clefairy
2. Jigglypuff
   Marowak

Gyarados, the final form of Magikarp, is a flying/water type Pokémon which is depicted as a Chinese dragon/serpentine with a large, gaping mouth and an aggressive temperament.

1. Metapod
   Butterfree
2. Pikachu
   Kakuna

This lovable, Electric-type Pokémon is Ash's trusted companion and is identified by its chubby, yellow body with a red electric storing patch on both cheeks.

1. Butterfree
   Persian
2. Tangela
   Horsea

Persian, which evolves from Meowth, is a feline Pokémon with cream-colored fur, three whiskers on either side of its face, and a red jewel embedded in its forehead.

1. Metapod
   Spearow
2. Jigglypuff
   Poliwrath

This cute normal/fairy Pokémon is known for scribbling all over the face of anyone who falls asleep upon hearing its trademark song.

1. Meowth
   Onix
2. Beedrill
   Arbok

This Pokémon is depicted as a small feline with a pale tan coat which, like Team Rocket's Meowth, is capable of human speech and walking on its hind legs.

1. Slowbro
   Rapidash
2. Geodude
   Kingler

Kingler, the second form of Krabby, is a crab-like water Pokémon which characterized by its unevenly sized claws.

1. Golbat
   Scyther
2. Nidorina
   Rattata

Scyther is a bipedal, insectoid Pokémon with a green coloration which evolves into Scizor when traded holding a Metal Coat Stone.

1. Cubone
   Weepinbell
2. Primeape

This Fighting-type Pokémon, which evolves from Mankey, is identified by its whitish shaggy fur, brown arms, and legs with metal shackles on the wrists and ankles.

1. Cloyster
   Jynx
2. Voltorb
   Diglett

Cloyster, which evolves from Shellder, is depicted as having a jagged light-blue shell which encases its black, pearl-like head.

1. Articuno
   Kakuna
2. Vileplume
   Kadabra

Articuno, one of the three legendary birds of Kanto, is portrayed as a large bird with a blue-colored plumage, a long, streamer-like tail and three rhombus-shaped feathers on its forehead.

1. Arbok
   Metapod
2. Machamp
   Beedrill

This Fighting-type Pokémon is portrayed as a muscular humanoid figure with an extra pair of arms, which are used to throw extremely fast punches.

1. Mew
   Squirtle
2. Magmar
   Hitmonlee

Hitmonlee, one of the three final forms of Tyrogue, is a Fighting-type Pokémon which is frequently found in urban areas rather than the wild.

1. Nidorina
   Vulpix
2. Sandslash
   Clefairy

As the previous form of Ninetales, Vulpix appears as a small fox-like fire Pokémon with a red-brown coating, six orange tails and locks of curled orange fur which fall on its head.

1. Weepinbell
   Gastly
2. Marowak
   Tangela

As a ghost/poison type, Gastly has no true form and is depicted as having a round, spherical body which is surrounded by a purple, poisonous haze.

1. Cubone
   Gengar
2. Rapidash
   Onix

In comparison to its previous forms Gastly and Haunter, Gengar has a more definite shape, complete with arms, legs and a stubby tail.

1. Dewgong
   Poliwrath
2. Rattata
   Lickitung

Lickitung, the previous form of Lickilicky, is known for its long powerful tongue which, at 2 meters, is twice as long as its body.

1. Butterfree
   Spearow
2. Snorlax
   Jigglypuff

This large, bipedal, dark blue-green and cream-colored Pokémon is a frequent sleeper, occasionally waking from its slumber to eat and less often for exercise.

1. Kadabra
   Beedrill
2. Alakazam
   Kakuna

Alakazam is the final form of Abba which, using the Alakazite stone, can Mega Evolve into Mega Alakazam.

1. Weepinbell
   Haunter
2. Diglett
   Kadabra

Haunter, which lives in dark, haunted caves, is a characterized by its disembodied hands which are the result of its gaseous body.

1. Slowbro
   Geodude
2. Nidorina
   Dodrio

This flightless avian Pokémon is noted for its three heads, each of which has its own working brain, as well as three separate hearts and lungs.

1. Bulbasaur
   Rattata
2. Beedrill
   Spearow

Bulbasaur, which evolves into Ivysaur and later on Venusaur is a grass/poison type Pokémon noted for the green plant bulb on its back.

1. Butterfree
   Metapod
2. Lapras
   Kakuna

Lapras is a water/ice type Pokémon which is identified by its blue skin and large gray shell which is covered with blunt knobs.

1. Clefairy
   Golbat
2. Sandslash
   Chansey

This pink, ovoid Pokémon is frequently seen working at the Pokémon centers, where it uses its healing abilities on patients.