I'm here to tell y'all about the Pokémon Omnidex! Probably you'll say: "What is the Pokémon Omnidex?" Well the Pokémon Omnidex is a very reliable and useful source of information on a lot of things! First of all you can find most of the Game Mechanics of the Pokémon games! They have also contests every week! The first contest is about making your own Pokémon with toyblocks!
Second of all, they have a page for every Pokémon of the 493 ones! From Bulbasaur to Arceus! You can find its movepool, its eggmoves, its weight & height and a lot of more! Then you can have a look at the IV calculator, which is pretty awesome as well. And they explained a lot about EV's and abilities too! They also have everything explained on berries, items and moves! Talk about something awesome!
And the importantest thing: The Omnidex is updated weekly!
Well, what would this explination be without the link?