Why is Glalie above Mega Glalie in the viability thread? I understand Moody is allowed, wouldn't that benefit Mega Glalie just the same?
Once Glalie Mega Evolves it can't continue to fish for more Moody boosts, which is actually a big deal. The whole point of Moody Glalie is to take advantage of the wild boosts as much as you can, and it requires both Substitute and Protect to achieve this as effectively as it does. As a result it needs Leftovers to function, and since it only uses Frost Breath (for crits to ignore SpAtt drops and setup sweepers) and Sheer Cold as its moves the Mega doesn't help it significantly anyway.