Which is the better mega for Vgc: Mega Kangaskhan or Mega Mawile?
Mega Kangaskhan is far more metagame defining. If one doesn't prepare for it, its very easy to lose very quickly. However, that doesn't mean Mawile is bad, and actually one of the great traits of Mawile is its positive match up against Kangaskhan.
Can someone show me a good move set etc for a quiet, anylitic 31/0/31/31/31/0 iv magnemite? It took me forever to get one and now that I do (have multiples because yay cloning) I want to get some awesome use out of them.
Magnezone isn't too great in VGC. It's pretty slow, weak to common attacking types like Ground and Fire, and doesn't offer much that other Electric types can't do. However, if you're set on using it, I'd look at a bulky attacker set. Assault vest might put in some work, it could bulk you up against Rain teams, and helps tank Shadow Balls from Aegislash. Protect might be too necessary to pass up on something with its weaknesses though, so resist/sitrus berry with an EV spread to survive attacks its likely to face (can't really think of anything too important atm, but I'm sure there is) might be best. Worst comes to worse, Max HP Max Sp Atk would be a good place to start, and you can alter when you find moves you want to live.