Basically this. Serebii has been the first to do coverage on every game since DP. I usually turn to them for my Pokémon news related updates.
And while Bulbapedia does tend to go in-depth, only people in charge can edit Serebii, while anyone can edit Bulbapedia, which is why I usually find Serebii more reliable. I do check them both as far as what Pokémon can utilize and such goes.
However, one thing I do question is that for Pokéarth, when they would list trainers in locations from the DS era (Sinnoh, HGSS and Unova) they'd have their moves listed, but they don't have that for Kalos. I also wonder if they'll ever get around to listing percentages for wild Pokémon...