Mmm, well there have been subtle tweaks and refinements each generation... I'd argue if you've never played a pokemon game before, the newest is always the best place to begin, and that constant new player children market is one Nintendo counts on.
If it really were porn... but it doesn't. I'm not less pokémon fan than you only 'cause I've drawn a pokémon with boobs. Internet is a vast world where regular pokéfans can live with people that likes to draw some pervy pokéart.
It's like if me, that I don't like furry porn, went to some artist profile that draws furry explicit porn and told him "Ey. I don't like furry porn. You are ruining my vision of furry, you know..."
I respect your opinion but I don't share it. If you don't like something, just turn back and leave.