Just a couple of thoughts about the supposed leaks: (although I may be a little late to the party, since everyone is talking about E3 now)
- Pancham evolves into Pangoro in the early level 30s. In order to evolve Pancham into Pangoro, you need to have one other Dark-type Pokemon in your party. Pangoro’s type is Fighting/Dark.
While a dual requirement of level up at x level and level up with a Dark-type seems unusual, Gamefreak did introduce Mantyke in Gen IV, which needed to level up with Remoraid in your party, so it's not technically THAT far off. Also, needing a Dark-type and a specific level could mean that the evolution method could be based on a youth growing up with a bad influence and becoming a delinquent / criminal.
A Pokemon named Inkay evolves into Malimar. To evolve it, you have to hold your 3DS upside-down when it levels up (the 3DS has an accelerometer and gyroscope, so it can detect that). Malimar’s type is Dark/Psychic.
Just speculation here, but it could be possible for Inkay and Malimar to be based on lemurs/aye-ayes. Name wise, Inkay could be Ink/Inky + Aye-Aye, and Malimar could be
Malicious + Lemur. Also, aye-ayes are nocturnal, and,
(back me up, Wikipedia), in Madagascar, Aye-Ayes were thought of as harbingers of evil and death, which could explain the Dark-typing.