Originally Posted by NTT
Platinum didn't bring any new pokémon, just new formes of existing pokémon (Giratina, ShSimon and Rotom). GF have never added completely new pokémon mid-generation.
But yeah, I hope we'll see a way of keeping Meloetta in her Step Forme.
If that were to happen, then Kyurem gets Freeze Bolt and Cold Flare like its supposed to.