Pokémon leaving NU

Alomomola (high level RU threat)
Ampharos (Mega)
Banette (Mega)
Braviary (mid level RU threat)
Charizard (OU)
Exploud (mid level RU threat)
Gardevoir (UU)
Gorebyss (mid level RU threat)
Mandibuzz (OU)
Mawile (OU)
Pinsir (OU)
Shuckle (mid level RU threat)

Pokémon joining NU (using low level threats from this list: http://piratepad.net/NpZYXZ1SIv)

Everything from gen 5 NU not above
All NFEs
Accelgor
Ambipom
Archeops
Aurorus
Avalugg
Barbaracle
Bouffalant
Carbink
Clawitzer
Claydol
Crustle
Cryogonal
Dedenne
Dusclops
Dusknoir
Electivire
Feraligatr
Ferroseed
Furfrou
Gogoat
Gourgeist-Large
Gourgeist-Small
Gourgeist-XS
Hariyama
Hippopotas
Hitmonchan
Jynx
Kangaskhan
Klinklang
Lilligant
Magmortar
Malamar
Meowstic-F
Meowstic-M
Mesprit
Ninetales
Omastar
Pangoro
Politoed
Poliwrath
Pyroar
Qwilfish
Rhydon
Rotom
Rotom-C
Sandslash
Scyther
Spiritomb
Steelix
Typhlosion
Vivillon