I am having difficulty with Gen 5, I think. Although I remember Zebstrika (that was very loud!).
btw, what is this Pokedex 3D Pro quiz thing?
I could probably identify the first 386 with ease, specifically the 202 from the regional Hoenn Dex. Up to the 493, I could probably identify them all, except it would take me a few seconds to know them. The 649, I don't have it completely memorized and it may take me a minute to deceiver the ones I do know. However playing through Black 2 helped memorize most of them. The only issues I would have are with the Kanto Sound a likes and the Elemental Monkeys.
I think I know almost every cry for Johto and Hoenn pokemon. I can identify some, if not most in Kanto and Sinnoh. Unova has me lost =P
I know the cries of every Pokemon in existance. I enjoy memorizing their cries for the sake of it. I haven't cleared the quiz where I have to identify the cries of every Pokemon, but I am sure I can get a perfect score.