Aerodactyl is #142 in the national pokedex, and it is a Rock-Flying type Pokemon.
In the National Pokedex Muchlax is number 446.446
Growlithe is number 58 on the national pokedex.
Gyarados is #130 in the National Pokedex.
To get an Aerodactyl in Pokemon Pearl you simply need to revive the Old Amber at the Oreburgh Mining Museum. To get an Old Amber you first need the National Pokedex from seeing every Pokemon in the Sinnoh pokedex. After getting the National Pokdex the Old Amber should start to appear if you dig in The Underground like with the other fossils.
Croconaw is number 159 in the National Pokedex.
Eevee's number in the national Pokedex is #133. If you don't know what the Pokemon's number is then go to pokemondb.net/pokedex/national It is a great site to find Pokemon's number!!
Sceptile is number 3 in the Hoenn Pokedex and number 254 in the National Pokedex.
Shaymin is number 492 in the National Pokedex.
It's number 197 in the National Pokedex.
Skarmory's Pokemon number in the National Pokedex is 227. Hope that help ^-^
On the national, Persian. On Black & White, Whimsicott.
is #556 in the national pokedex, and it is a Grass type Pokemon.