Alright guys, I'm brand spankin' new to competitive, and I don't much plan on playing that much of it anyways, but I would like to have and edge on these little kids when I play online. So far I haven't really got much of my team COMPLETELY decided, but I do know that it'll be more bro chosen than ability.

I've got:
Shiny Volcarona
Mawile
Gardevoir
Klefki
Noivern
Garchomp
Shiny Charizard X/Y
Shiny Wailord
Venusaur
Aegislash
Greninja

Any 'Mons I should also consider?
Any team suggestions/move sets?

Any help is appreciated!