O is for Onix, the rock very of Garydose. 

next up is P. 

P is for Poliwag, which has two final evolution forms, Poliwrath and Politoed.
Next is Q.

The letter "Q" would have to go to Quilava.

Type: Fire.
Species: Volcano Pokemon.
Abilities: Blaze and Flash Fire (Hidden ability). 
Exp at level 100: 1,059,860.
Pokedex numbers: #005, National. #156, Johto. #311, Hoenn.
Regional Browser Number: R-020, Fiore, R-158 and N-078, Oblivia.
Height: 2'11" or 0.9 m.
Weight. 41.9 lbs. or 19 kg.
Dex color: Yellow.
Catch rate: 45 (5.9%)
Gender ratio: 87.5% male, 12.5% female.
Breeding: Field group, 21 cycles (5,355 minimum steps).
EV yield: 0 to HP, ATK, DEF, and SP. DEF. 1 to Sp. ATK and SPEED.
Evolution chain: Evolves from Cyndaquil at level 14 and evolves into Typhlosion at level 36.

Like its pre-evolution, Cyndaquil, the top half of Quilava's body is blue and the lower half creamy-colored; however, its entire body is slimmer in proportion and it is now a quadruped. It also has triangular ears with red-colored insides. Quilava possesses a much smaller, more rounded nose than the one it had as Cyndaquil, and its eyes are open, revealing its red irises. It has five red-colored spots on its body in which it projects flame at will, two in a somewhat exclamation-mark shape on its forehead and three lined up horizontally on its rear. Quilava's fur is non-flammable, so it can withstand flame attacks. The fire coming from its head and rear, which are stronger than Cyndaquil's, can be launched as a flame attack. It also uses gusts of superheated air as a battle technique. Quilava is known to be less timid than Cyndaquil, though its behavior appears to be affected by its surroundings. A very common occurrence during evolution is an increase in aggression. Although Quilava is a natural quadruped, it is prone to rising onto its hind legs on occasion, to enough of a height as to be able to use Focus Punch, which usually can only be learned by naturally bipedal Pokémon. Quilava seem to have a predilection for turning its back on its opponent before and when in battle. When before the battle, it is to display how ferociously its fire blazes. When in battle, this means it will attack with the fire on its back. The intensity of the flames also increases in battle, with its Fire-type attacks only boosted when it is weakened. Quilava is described to apply its nimbleness to dodge attacks, even while scorching its foes. Quilava has been known to adapt to many habitats; however, it is usually found in the care of Trainers.






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R is for Rhyhorn, the dual Ground/Rock type pokemon.
Next is S.

S is for Squirtle. A water type starter pokrmon from the kanto region. Next letter is T.

T is for Turtwig, the Grass type starter from Sinnoh.
Next is V.

V is for Vigoroth



Vigoroth is a white, sloth-like Pokémon, with a teardrop-shaped tuft of red fur on its forehead. It has stubby, barely noticeable ears, two small, triangular visible teeth in each jaw, and large eyes encircled by brown rings. The two stripes on its back and maw are also brown in coloration. It arms are fairly long in proportion to its body, and its hands and feet are equipped with two sharp black claws. The underside of its hands and feet have circular red coloration, its rear also having a baboon-like patch of red. The fur on its chest, tail, and sides of its maw are shaggy.

NEXT IS W

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Y is for Yanma. The pre evolution of Yanmega. A bug type located in the Johto region.

Z is for Zebstrika. A electric type pokemon from the unova region. Next letter is A.

B is for Budew, the pre-evolved form of Roselia, shown in Generation IV.
Next is C,

C is for Charmander. A fire type starter pokemon from the kanto region. Next letter is D.

D is for Donphan the evolved form of Phanphy 

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F is for Furret. A normal type pokemon from the johto region. next letter is G.

G is for Gible the pre- evolved form of Gabite 
H is the upcoming letter