>>22020263Ampharos is even shittier in ORAS, don't be in denial, Sharpedo still chokes at priorities and can't abuse permanent rain as it did in Gen5, plus it doesn't really benefit from Strong Jaw at all, the base speed wasted because of the "excessive" defense gifts is also mediocre not allowing it to switch multiple times once evolved.
>>22020604Agility Ampharos is complete garbage, best place it can abuse consist of the lowest tiers and it was already rare in XY since not really worthy. Sharpedo's abilities and bulk can't really stand the comparison with Gyarados, especially now that both have Crunch.
Mega Pidgeot is pretty much like Tornadus-T, where both have an acceptable bulk, one has Roost the other Regenerator and mixed flexibility.
Steelix technically would still be good with Sheer Force even without the Life Orb, but considering all it does is spamming Gyro Ball and Earthquake it can pass, still an inferior Aggron.
>>22020652About Diancie, the reason I don't consider it extremely good for a mega is the poor bulk and initial speed, you are forced to mega on stallish mons only otherwise you risk taking an immense damage once mega evolved, it completely loses its debatable "bulk" plus the mega rarely runs some bulk EVs leftovers.
Tanking one hit and firing back could easily stop its possible sweep, RP or CM regardless.
It isn't terrible but it isn't amazing either as it may look on paper.