Ok /vp/, how about this?

Gen VII, Mega Milotic
Water/Fairy

95
60 +10--> 70
79 +35--> 114
100 +20--> 120
125 +15--> 140
81 +20--> 101

New Ability: Guard Scale
The Pokemon takes half damage from contact moves.

New Signature Move for Milotic:
Mermaid Breath
80 BP 100 Acc Fairy-type
Fire and Steel resistance to Fairy are treated as weaknesses instead for this move.

You can probably tell by now its function.

Leave your ideas for new Megas (that preferably handle existing Megas).