The problem there, though, is that the is a lot of ground covered by the word "Pokemon". Are you talking about the games? Or the movies, TV shows, merchandise, spin offs, etcetera?

Most people, especially those with no personal involvement with Pokemon, group everything together, in which case it is easy to hate.

I've never hated the games, quite frankly, I think they are incredible. The gameplay system is incredibly easy to get into and has a solid progression of new features. Yet it also has an astounding depth that can be min/maxed for years, and a near perfect presentation that surrounds the progression.

I hate the anime with a passion. It completely ruins everything that was great about the battle system (HINT: Thundershock will NEVER kill Onix, not even with a level 100 frelling Pikachu. IT DOESN'T HURT GROUND TYPES), is poorly written, and features "villains" who don't even merit the title.

There is a lot about the Pokemon games to love, but there is a lot to hate about Pokemon in general as well.