Alright, I don't want to necro any past threads, so I'm making a new one. Cool? Okay.
In my opinion, I feel that some lesser acknowledged Pokemon should be able to Mega evolve for OR/AS, since I feel some of them have some awesome potential with them. Let's take a look at Mega Huntail and Mega Gorebyss:
[spoiler=Mega Huntail]
Ability: Defiant
HP: 55
Attack: 144 (+40)
Defense: 105
Special Attack: 84 (-10)
Special Defense: 105 (+30)
Speed: 92 (+40)
[spoiler=Mega Gorebyss]
Ability: Competitive
HP: 55
Attack: 84
Defense: 105
Special Attack: 144 (+30)
Special Defense: 105 (+30)
Speed: 92 (+40)
A Water/Dark Mega Huntail along with a Water/Psychic Mega Gorebyss would be kinda badass, in my opinion.