Everything except Unown and some legendaries : Mewtwo, Lugia, Ho-oh, Kyogre, Groudon, Rayquaza, Deoxys, Dialga, Palkia, Giratina, Regigigas, Darkrai, Shaymin, Arceus, Zekrom/Reshiram (the opposite legendary), Kyurem, Landorus, Meloetta and Genesect.
And I don't think it's possible to build a...