My Arceus! Full of sweepers and bulks!
Lopunny's Punch moves, Drain Punch, Ice Punch, and Thunder Punch, have a lot of uses...
Drain Punch for damage and for HP
Ice Punch for Flying Types that are Lopunny's weakness
Thunder Punch... For variety of uses...
Return is too HKO for a Mega... It totally has 120 base power, not buts.
Poygon2's role is mainly to eat up attacks and to deal of HP loss. It could be a Pokemon to set up Toxic, Thunderwave, ect. because of this.
It's Recover+ Toxic+ It can eat up hits= Some bulk, and the most hardest Pokemon to KO, literally.
Pyroar at is argued the most. It's a gosh darn lion, but a special attacker?! No way!
For this, it's special attack it very dangerous, because for the people who think Physical will defend thier Pokemon, hah, no.
It's Hidden Power, which is grass, will hit HARD, as I mean, REALLY, REALLY HARD on those not expecting it.
Jellicent is a special wall, a really special wall. I would have choosen Chandelure over Jellicent because of it's high Sp. Atk, but Jellicent is better when taking hits.
Why not a special fighting type move, to screw dark types? :P
Shiny Espeon is cool. Whats better is that it more bulky than any psychic type, which makes up for it's speed.
Like Jellicent, why not give it a special fighting type move (still, I have no memory of the name...) to screw some Dark types, cause obviously you got a Dark type weakness, but Lopunny's covers it just fine, but, just surprise them.
Of course, Weezing is a physical wall, because you already have a special wall (Jellicent).
Since it has levitate, the ground weakness is gone, so I don't have to explain that, do I?
The Psychic weakness is what job Jellicent does, but you could still KO one with this set.
That's all I have for team, because it really has no holes in it. Everyone covers their weaknesses, and you've got 2 sweepers and 2 walls. So, get going, cause this team, will rock the roofs!
Source: Experience and Serebii.