Well, I'm not exactly sure, but I'll just write the list here. It's no real secret.
Articuno
Moltres
Zapdos
Celebi
Ho-oh
Lugia
Rayquaza
Kyogre
Groudon
Mew
Mewtwo
Deoxys
And more probably.
Also, I plan on having a tournament style pokemon league. It'll be sweet.