Just check Serebii's Pokedex. The encounter rates are kind of vague("rare", for example, can mean something from 5% to like 25%), but everything else is probably the best you'd find anywhere.
Well, I don't have a specific list, but depending on what they mean (event only from this game, or event only from the previous gen games as well) then they mean every Pokemon besides Darkrai, Shaymin, Arceus, and possibly Mew, Lugia, Ho-Oh, Celebi.
Those are the only event-only pokemon I can think of right now, anyone please feel free to add on if I missed any.
It's actually $20usd (19.99) and doesn't mention any of the DP event pokemon at all (aside from Manaphy/Phione). Aside from missing the base-stat #s and not talking about IVs (and which pokemon yield what EV), it's the most comprehensive guide you could ask for, especially mapping out pokemon by route.Of course, you could always plop $15 on the new Dex guide by Prima...xP