I know, the Luvdisc-Mamambo no-evo bugs me too.Then what's the deal with Mamanbou? If Luvdisc doesn't evolve into it, what's the point with it?
And another thing is that an evolution line in Pokémon can't exceed 3 Pokémon in a row, so it can't be a Porygon pre-evolution.
I said Porygon because the silhouette looks so... squarish.
Mmm.. could be a rockish pokemon, or maybe is the pokemon from that video, the grass pokemon that is running in the daycare.If that silhouette is real, my guess would be that it is related to Gigaiasu based on its jagged-ness and the spike coming off the top. My two cents, but it could be anything really.