There are over 150 of them, and most aren't worth wasting your time. But there are a few cute ones I immediately fell in love with:

Bulbasaur
Bulbasaur are a combination of Grass-type and Poison-type Pokémon. Because they are Grass-type Pokémon, Bulbasaur have plant-like characteristics such as the large, leafy growth on their back. Over time, Bulbasaur will evolve into Ivysaur and Venusaur.

HEIGHT: .7 m
WEIGHT: 6.9 kg
EVOLUTION: Bulbasaur-Ivysaur-Venusaur

Jigglypuff
These Pokémon are rare and deceptive: Although they're cute and cuddly in appearance, the Jigglypuff Sing attack will send even the toughest Pokémon to dreamland, rendering defenses useless.

HEIGHT: .5 m
WEIGHT: 5.5 kg
EVOLUTION: Jigglypuff-Wigglytuff

Pikachu
These mouse-like creatures are among the most sought-after Pokémon. Trainers often have a hard time keeping several Pikachu in one place, however, because a high concentration of Pikachu will trigger electrical disturbances in the atmosphere. Pikachu evolve into Raichu with the use of the Thunder Stone.

HEIGHT: .4 m
WEIGHT: 6 kg
EVOLUTION: Pikachu-Raichu

Psyduck
A Psyduck defeats its opponents by mesmerizing them with a piercing stare and unleashing a barrage of pent-up mental energy. These Water Pokémon are rare.

HEIGHT: .8 m
WEIGHT: 19.6 kg
EVOLUTION: Psyduck-Golduck

Snorlax
Snorlax enjoys sleeping more than anything, and will often lie down at the first open spot.

HEIGHT: 3.3 m
WEIGHT: 500.7 kg
EVOLUTION: None

Most of the other Pokemon are downright annoying. But give these few a chance - I'm sure you'll love them as much as I do, in time.