For the actual versions no spinoffs there is 15 so far.
the only way to get mew on Pokemon diamond/pearl is cheat with an item such as an action replay or cheat on the gameboy advanced verions with an item such as gameshark then migerate.
The only difference is in the Title. In America, the title was changed from "Harry Potter and the Philosopher's Stone" to "Harry Potter and the Sorcerer's Stone"
as in how many are there altogether there are 493
200 POKEMON 200 POKEMON
256
THERE ARE 267 POKEMON IN TOTAL
7 "legendary" Pokemon
6 pokemon.
385 Pokemon.
493
There are many.
with raising the Pokemon with that Pokemon for many time You can raise your Pokemon happiness by defeating many trainers with Pokemon do you want to raise.