@ Harakudoshi: Actually, there are some hints in the games that, at least in the past, Pokemon and humans went as far as to get married. And considering Pokemon can be attractive (Gardevoir) and have human-like intelligence, it would be far from farfetch'd.
Keep in mind some pokemon were human at one point in time I believe abra is one example. The western games toned the more horrifc entries down but some of the original entries were pretty terrifying in that children became pokemon.