Darkrai, Shaymin, or Arceus (if you have them because I know you need to hack or go to an event)
Cresselia
Dialga
Palkia
Mesprit Uxie Azelf
Giratina (especially if you have platinum I really want the Origin Form Giratina)
Heatran
Mew
Mewtwo
Zapdos
Articuno
Moltres
Lugia
Ho-oh
Celebi
Jirachi
Suicune
Entei
Raikou
Latios
Latias
Deoxys
All 4 Regi-s (including Regigigas)
Rotom