Pikachu to mega-evolve. He has a perfectly fine regular evolution.
Pikachu has an evolution, so there is no reason for it to get a Mega Evolution. Raichu, on other hand, would gladly welcome the power and the popularity boost that a Mega Evo might give to it. Yeah, there is no proof a nfe Pokémon can't mega evolve, but as of now, only fully evolved Pokémon are known to mega evolve, so...
They were(not in this order) -Bug(Viola), Rock, Dark(Evil female, or double battle-two leaders), Fairy(female), steel or psychic(Clemont), Ice, Fighting(Corrina), Ground, Poison or Ghost.
If you see carefully there is a relation between all the Gyms of all the 5 regions. 3 or 4 gyms type return in the following Generation.
As for the Elite Four, I wouldn't like reusing types. I thought about them, specialising in the fourth element of Life-Grass, Fire, Water and Flying.
I sincerely doubt Gamefreak is going to render certain Pokemon useless and forgotten because their pre evolved Pokemon received a mega evolution.
Source that it was taken from a YT video that was taken down?
Pearl FC: 0689 8559 2961
Platinum FC: 3868 1384 3198
SoulSilver FC: 2021 2908 5745
Black 2 FC: 4170 2700 6717
There's gonna be a Pokemon Direct tomorrow at 7 am EST. Maybe we'll get new information there.
We'll likely get more X/Y information tomorrow via the latest Pokemon Direct. The tweet indicates we will, anyway.
The only other sources I see for this pic are all dubious.
Step into the Fairy circle
That Froakie Evolution was made, like, within a week of XY being announced, it's one of the first evolution ideas I saw for him.
Duel Monsters Sengoku!
An original Yu-Gi-Oh Fanfic! Join Yuto Masamune and his Imperial Monster Patch-Eye Dragon as they take on Sengoku Academy!
Current Chapter -Turn 2: One-Eyed Duelist, One-Eyed Dragon! Impress Summon, [Patch-Eye Dragon]!
Yuto continues his Duel against Shisa, a delinquent who calls himself a "Chain Duelist!". Just then, as Shisa's strong offense and defense overwhelms Yuto, a new type of summon occurs!
I really hope they don't evolve into those...
Claimer of Garchomp and Steam Eruption
Hopefully they will reveal something interesting tomorrow, but knowing Nintendo, I'd rather not expect much from their "Directs".