1. Caterpie
   Weedle
2. Pidgey
   Squirtle

Don't get Squirtle mad because this Pokemon will spray water from its mouth to knock an opponent down! It's also featured in the original Pokémon series.

1. Sandshrew
   Spearow
2. Pichu
   Ekans

In the Red and Blue version, the Spearow flaps its short wings at high speeds to stay airborne. But in the Yellow version, Spearow is more agile, flying around quickly to protect its territory.

1. Meowth
   Psyduck
2. Mankey
   Growlithe

Meowth adores circular objects and shiny things. It wanders the streets every night to look for dropped loose change.

1. Weedle
   Rattata
2. Spearow
   Pidgey

The Weedle is often found in forests, eating leaves. One wrong step and you'll feel its sharp venomous stinger that sits on top of its head.

1. Zubat
   Paras
2. Venonat
   Diglett

Just like a parasite, Paras burrows to suck tree roots for nutrients. The mushrooms on its back also grows by drawing nutrients from the bug host.

1. Oddish
   Jgglypuff
2. Cleffa
   Vulpix

Igglybuff has a base experience yield of 39. With its big round eyes, how can you not swoon over it?

1. Paras
   Oddish
2. Cleffa
   Vulpix

Now that's a neat trick! When born, Vulpix has just one tail. Then tail splits from its tip as it grows older and new tails are grown.

1. Paras
   Oddish
2. Venonat
   Diglett

During the day, Oddish keeps its face buried in the ground. At night, it wanders around sowing its seeds.

1. Igglybuff
   Cleffa
2. Nidoran
   Vulpix

Nidoran can be male or female. Its poison moves are super-effective against grass and fairy, but have no effect on steel.

1. Vulpix
   Cleffa
2. Igglybuff
   Zubat

The Zubat is found in colonies and dark environments. It also uses ultrasonic waves to identify and approach targets.

1. Tentacool
   Abra
2. Machop
   Bellsprout

Using its mind, if the Abra senses danger, it will teleport itself to safety even as it sleeps. And that's a good thing because it sleeps 18 hours a day!

1. Growlithe
   Abra
2. Machop
   Bellsprout

Although friendly, if an intruder is on its territory, this Pokemon will bark and bite. This Pokemon also attacks with fire moves.

1. Zubat
   Venonat
2. Diglett
   Meowth

Venonat lives in the shadows of tall trees where it eats insects. Like a moth, it is attracted by light at night.

1. Vulpix
   Nidoran
2. Cleffa
   Igglybuff

You have a choice to evolve Nidoran as a male or female. The difference is that the male Nidoran stiffens its ears to sense danger. And as it grows its horns, it strengthens the power of its venom.

1. Rattata
   Pichu
2. Spearo
   Ekans

In the Yellow version of the game, Rattata's fangs like to sink into anything and everything. And if you see one, you'll see many more as they move in large groups.

1. Squirtle
   Charmander
2. Pikachu
   Weedle

Like an ordinary reptile, this Lizard Pokémon prefers hot places. When it rains, steam can spout from the tip of its tail. What a charming Charmander!

1. Tentacool
   Machop
2. Bellsprout
   Geodude

It's not just a punch that will down an opponent, Machop is a master of many types of martial arts. This Pokemon is very powerful despite its small size.

1. Bellsprout
   Tentacool
2. Geodude
   Ponyta

Bellsprout knows how to survive in hot and humid places. This Pokemon also uses its root feet to soak up needed moisture while using its vines to catch tiny insects for consumption.

1. Slowpoke
   Tentacool
2. Geodude
   Ponyta

Watch out for its stinging acid if you accidentally hook the Tentacool. But you can do a Tentacool a favor if you find it dry and shriveled on the beach. Toss it in the water and it will revive itself!

1. Abra
   Growlithe
2. Mankey
   Poliwag

Don't try to walk this Poliwag around. It is more adept at swimming than walking. Did you know that the direction of the spiral on the belly differs by area?

1. Pichu
   Ekans
2. Rattata
   Pidgey

Pidgey is a common sight in forests and woods. But don't look too closely, you'll get sand in your eyes from its quickly flapping wings.

1. Growlithe
   Psyduck
2. Mankey
   Poliwag

Always tormented by headaches, Psyduck uses psychic powers. But it can only use its psychic powers when its dormant brain cells wake up.

1. Diglett
   Meowth
2. Psyduck
   Mankey

Diglett lives about a yard underground where it feeds on plant roots. It's a digging machine to get the nutrients it needs, and sometimes appears above ground.

1. Machop
   Abra
2. Mankey
   Growlithe

Careful, one wrong look and this Mankey might turn on you. This agile Pokemon is quick to anger and will attack anything.

1. Sandshrew
   Pichu
2. Nidoran
   Ekans

Keep Ekans away from Pidgey and Spearow because this stealthy Pokemon eats their eggs whole! The name "Ekans" is also "Snake" backwards.

1. Cleffa
   Vulpix
2. Sandshrew
   Nidoran

The Sandshrew burrows deep underground in arid, sandy conditions. Watch closely, it only emerges to hunt for food.

1. Raichu
   Seel
2. Grimer
   Gastly

Now you Seel it, now you don't! This Pokemon may be under the water or breaking through thick ice with its horn. Seel also uses many types of water moves.

1. Magnemite
   Slowpoke
2. Doduo
   Seel

Although incredibly slow, Slowpoke possesses strong abilities to take down a variety of Pokemon. Its weaknesses include dark and ghost-type Pokemon.

1. Shellder
   Doduo
2. Seel
   Grimer

This Pokemon has two "D's" and two "O's" in its name and has two heads! Its short wings makes flying difficult, so this Pokemon runs at high speed on strong legs.

1. Magnemite
   Geodude
2. Slowpoke
   Ponyta

Don't mistake Geodude for a boulder. If you step or trip on one accidentally, you'll anger this rock-like Pokemon.

1. Doduo
   Seel
2. Grimer
   Magnemite

This one is always a fun Pokemon to train. Magnemite uses moves like Thunder Wave and Thunder to shock and paralyze its opponents.

1. Sandshrew
   Pikachu
2. Cleffa
   Nidoran

Pikachu is the most recognizable Pokemon in the entire Pokemon universe. Known the world over, this is the adorable electrical companion that you want with you!

1. Rattata
   Caterpie
2. Weedle
   Pidgey

Life would be great with Caterpie's powers. This Pokemon's short feet are covered with suction pads so it can climb slopes and walls effortlessly.

1. Exeggcute
   Voltorb
2. Krabby
   Cubone

The heads of this Pokemon attracts to each other and spins around to confuse its enemies. There must be six heads for it to maintain balance.

1. Slowpoke
   Magnemite
2. Ponyta
   Doduo

Ponyta hooves are 10 times harder than diamonds. It can trample anything completely flat in an instant. And if you want to see it jump incredibly high, you'll need the Yellow version.

1. Bulbasaur
   Charmander
2. Squirtle
   Caterpie

Bulbasaur is known as "Fushigidane" in Japan. By soaking up the sun's rays, the seed on its back grows larger.

1. Drowzee
   Krabby
2. Onix
   Gastly

If you like sly Pokemon, then you'll want to capture one of these. Gastly is almost invisible, and in battle, it cloaks its target with gaseous fumes and puts the opponent to sleep without notice.

1. Onyx
   Voltorb
2. Cubone
   Krabby

Did you know that portions of an Onyx's body are as hard as a diamond? This Pokemon also evolves into Steelix.

1. Shellder
   Grimer
2. Gastly
   Onix

Grimer finds sucking up polluted sludge that is pumped out of factories absolutely delicious. This Pokemon also has a variety of poison-type moves.

1. Drowzee
   Krabby
2. Shellder
   Onix

Watch this Pokemon carefully, because when its shell is open, it is vulnerable to attack. But when closed, the hard shell keeps its tender body safe and sound.