if you notice Pikachu is #25 in the pokedex and Meowth is #52.Now, if you write 25 backwards you get 52 and if you write 52 backwards you get 25.So these numbers are the excact opposite of each other.Moving on,Pikachu is a mouse and Meowth is a cat, just like their numbers, a mouse and a cat are the opposite of each other.Is it a coincidence ?