Yeah, it's part of Pokémon Adventures (look at the back of the cover, near the top). And it's AWFUL.
I suppose I've only read three volumes of it so far, but still... it's just horrible, and I don't think it can ever be fixed. The art is mostly sub-par (though I suppose that's to be expected from this series), the story - in the places where it differs from the game plot - is weird, the dialogue is depressingly bad, most of the characters are just... annoying... (especially Bianca)
My advice: Stay away. There are much better Pokémon manga series out there.