Pokemon X and Y keeps throwing out the secrets and tidbits of information, and the newest one is the brand new "Mega" form of pokemon which is something so weird that I'm not sure if I can legitimately conjure up words to describe it. Or perhaps, as I've been instructed elsewhere, "Weird" isn't exactly the correct word, but it's...it's different. It's something different in pokemon which is something at least. Various outlets have been running with the term "Mega Evolutions" and I'm not really sure that's the correct title - it shouldn't be - because of just how it works, which is why I'm just going to refer to them as Mega Forms. I may also call them Super Saiyan because come on that is what they are. You know it, I know it, everybody knows it, so let's not kid ourselves.
Anyway, basically what these new Mega forms are are a thing you can do with certain pokemon during a battle if they're holding a certain item, which we will call a Mega Stone for now. Every pokemon that has a Mega Form needs a unique Mega Stone which you will be able to get in-game except for the one for Mega Blaziken because it's a unique DLC event-item (that comes on a Torchic) that will only be available for a limited time because Nintendo still doesn't understand DLC.
Of course, that little bit at the end is the reason why it shouldn't be considered an evolution in traditional Pokemon senses. It's not permanent like Evolution in Pokemon is (and is...y'know, implied by the very term) and the change is not as 'drastic' as evolutions are. Ampharos grows some 70s metal hair, Blaziken cosplays Heihachi Mishima, and Mewtwo's tail moves to the back of his head because shut up. It is, of course, mostly about the stats, the boosts, which is why we can affectionately refer to it as "going Super Saiyan", especially when you consider the hair changes are quite prominent in the examples. They don't get bigger, they don't 'mutate', they don't suddenly grow two more of themselves, it's not evolution in the Pokemon sense in any way. Which isn't a bad thing, it just bears mentioning. Since...there really isn't much else -to- mention about it, really.
Mid-battle evolution has raised more than a few allusions to Digimon which basically relied solely -on- mid-battle evolution. Or at least, that's what the anime taught me, but the anime for Pokemon taught me a lot of stuff that is wrong too, so I don't even know. At the very least, evolution in Digimon isn't permanent either, and ties more closely to what Mega
Only six pokemon have Mega
even if Pikachu gets a Mega Form, I'mma roll with Raichu because Raichu is boss status