Oh my goodness, a Final Fantasy site with Pokémon threads (two things I really love). I like you guys.

To answer the first question - indeed, serebii.net is a very good site for such things, but I think if you want to know which pokémon you can find on which level and their location, then - i think - you will definitely find it if you search for it on gamefaqs.com.

Mhh, which were my favorite Editions?

Generation 1: Red
Generation 2: Crystal
Generation 3: Emerald
Generation 4: Pearl (482/493 - left: Mew, Lugia, Ho-Oh, Celebi, Jirachi, Deoxys, Darkrai, Manaphy, Phione, Darkrai, Arceus)