Alright guys. ORAS comes out on Friday.
Some more reports of the megaevolutions I've fought.
1. Mega Sceptile is basically a grass version of Mega Blaziken. It has STAB outrage so just think of it as a super Garchomp except grass / dragon. I think it's kinda derpy and dies too easily, but your experience might differ.
2. Mega Swampert is donkeyballs tanky. The one I fought tanked a 3x boosted STAB sucker punch with 30% hp to spare. That's pretty scary.
3. Mega Steelix is just the same thing as Steelix. Aka, don't use physical attacks against it, it dies to one fireblast.
4. Mega Glalie is meh, but it has the refrigerate return which is pretty nice.
5. Mega Diancie is pretty strong. Very hard to kill.
6. Mega Rayquaza is broken.
7. Mega Salamence is broken.
8. Mega Groudon is actually really scary. Because his physical defense is so high, you really can only deal with him with special attacks. However, he makes water moves unusable so basically you're limited to ground moves. Literally only ground special attack moves (aka earth power) will scare him. He has no other weaknesses. Earthquake? He just tanks it no big deal. Don't mess with him, it's pretty brutal.
9. Mega Kyougre is just like regular Kyougre except stronger. However, his new ability isn't as good as Groudon's as he never had a problem with fire moves to begin with.
10. Mega Camerupt sucks. He basically must have rock polish to function or he's worthless.
11. Mega Slowbrow sucks. His tankiness is not worth losing regenerator. Also no leftovers makes him really garbage.
12. Mega Sharpedo is a scary suicide pokemon. He usually spends the first turn boosting his speed. Then he starts attacking everything with a billion damage until he dies.
13. Mega Altaria is meh Its attacks are kinda pathetic with no real damage. It's quite tanky but it's not going to be able to do anything.
14. Mega Lopunny is really strong. STAB high jump kick with super base damage and super base speed. Also STAB return. It can fight everything.
15. Mega Gallade is pretty okay. It actually gets some pretty decent speed and combined with its tankiness to special attacks it can wreck a lot of damage.