The Tier list and rules that will be used on Serebii (to be used on Wi-Fi as well). Based off Smogon's tier list.

General Rules
Ubers are banned from OU downwards.
Dream World Pokemon currently unavailable are banned.
All moves that increase Evasion only (e.g. Minimize) are banned.
All instant OHKO moves (e.g. Horn Drill) are banned.
You may not use a Pokémon team carrying both Pokémon with the ability Swift Swim and the ability Drizzle.

Banned Abilities
Moody
Sand Veil
Snow Cloak

Banned Items
Soul Dew
Brightpowder
Lax Incense

Ubers
Code:
Arceus-Dark
Arceus-Ice
Palkia
Arceus-Electric
Arceus-Fire
Arceus-???
Kyurem-White
Arceus-Ground
Arceus-Bug
Thundurus
Tornadus-Therian
Genesect
Arceus-Steel
Lugia
Excadrill
Arceus-Fighting
Darkrai
Deoxys
Manaphy
Ho-Oh
Giratina
Giratina-Origin
Arceus-Dragon
Deoxys-Speed
Mewtwo
Dialga
Deoxys-Attack
Arceus
Shaymin-Sky
Groudon
Arceus-Flying
Zekrom
Arceus-Water
Rayquaza
Blaziken
Arceus-Psychic
Arceus-Rock
Arceus-Ghost
Reshiram
Arceus-Grass
Kyogre
Arceus-Poison
Deoxys-Defense
Landorus
OU
Code:
Celebi
Tyranitar
Infernape
Tentacruel
Heatran
Reuniclus
Lucario
Donphan
Gastrodon
Haxorus
Jolteon
Mamoswine
Blissey
Venusaur
Volcarona
Espeon
Magnezone
Salamence
Conkeldurr
Hippowdon
Kyurem-Black
Latias
Ninetales
Hydreigon
Landorus-Therian
Politoed
Alakazam
Gliscor
Ferrothorn
Jirachi
Dragonite
Terrakion
Forretress
Gyarados
Vaporeon
Breloom
Scizor
Cloyster
Latios
Thundurus-Therian
Skarmory
Garchomp
Jellicent
Gengar
Toxicroak
Keldeo
Dugtrio
Rotom-Wash
Metagross
Starmie
BL
Code:
Wobbuffet
Kyurem
Gothitelle
Staraptor
Chansey
UU
Note: The abilities Drought and Sand Stream but not Snow Warning are banned from tiers UU and below.
Code:
Heracross
Snorlax
Machamp
Mienshao
Scrafty
Rhyperior
Mew
Honchkrow
Kingdra
Slowbro
Xatu
Flygon
Sableye
Bronzong
Weavile
Chandelure
Rotom-Heat
Umbreon
Arcanine
Porygon-Z
Shaymin
Registeel
Tornadus
Porygon2
Cobalion
Mismagius
Crobat
Suicune
Blastoise
Darmanitan
Azumarill
Meloetta
Togekiss
Milotic
Swampert
Empoleon
Victini
Froslass
Zoroark
Virizion
Claydol
Abomasnow
Krookodile
Cofagrigus
Hitmontop
Bisharp
Houndoom
Dusclops
Gligar
Azelf
Yanmega
Raikou
Zapdos
Roserade
Sharpedo
Nidoking
Ambipom
BL 2
Code:
Venomoth
Cresselia
RU
Note: No pokemon in RU or below may have both Shell Smash AND Baton Pass on the same moveset.
Code:
Electivire
Manectric
Galvantula
Qwilfish
Moltres
Rhydon
Gallade
Mandibuzz
Spiritomb
Poliwrath
Absol
Scolipede
Cryogonal
Entei
Lanturn
Sandslash
Hitmonlee
Munchlax
Aggron
Clefable
Primeape
Omastar
Mesprit
Slowking
Steelix
Klinklang
Sigilyph
Tangrowth
Rotom
Sceptile
Drapion
Durant
Dusknoir
Snover
Hitmonchan
Magneton
Quagsire
Archeops
Hariyama
Crawdaunt
Magmortar
Smeargle
Aerodactyl
Typhlosion
Druddigon
Escavalier
Rotom-Mow
Medicham
Amoonguss
Cinccino
Kabutops
Lilligant
Nidoqueen
Crustle
Whimsicott
Bouffalant
Scyther
Feraligatr
Uxie
Ferroseed
Accelgor
Emboar
BL3
Code:
Jynx
NU
Code:
Weezing
Bastiodon
Misdreavus
Altaria
Roselia
Wartortle
Armaldo
Sawk
Ampharos
Gardevoir
Haunter
Glaceon
Rotom-Fan
Articuno
Kadabra
Skuntank
Ninjask
Miltank
Exeggutor
Rotom-Frost
Electabuzz
Torkoal
Kangaskhan
Regirock
Drifblim
Golurk
Stoutland
Electrode
Marowak
Cacturne
Lapras
Samurott
Floatzel
Liepard
Tangela
Alomomola
Gurdurr
Carracosta
Gorebyss
Jumpluff
Eelektross
Regice
Swellow
Ludicolo
Ditto
Piloswine
Musharna
Seismitoad
Pinsir
Braviary
Garbodor
Probopass
Sawsbuck
Charizard
Golem
Lickilicky
Zangoose
LC Banlist
Code:
Carvanha
Gligar
Meditite
Misdreavus
Murkrow
Scyther
Sneasel
Tangela
Vulpix
Yanma
Berry Juice
Dragon Rage
Sonic Boom
LC
Code:
Abra
Aipom
Anorith
Archen
Aron
Axew
Azurill
Bagon
Baltoy
Barboach
Beldum
Bellsprout
Bidoof
Blitzle
Bonsly
Bronzor
Budew
Buizel
Bulbasaur
Buneary
Burmy
Cacnea
Carvanha
Caterpie
Charmander
Cherubi
Chikorita
Chimchar
Chinchou
Chingling
Clamperl
Cleffa
Combee
Corphish
Cottonee
Croagunk
Cubchoo
Cubone
Cyndaquil
Darumaka
Deerling
Deino
Diglett
Doduo
Dratini
Drifloon
Drilbur
Drowzee
Ducklett
Duskull
Dwebble
Eevee
Ekans
Electrike
Elekid
Elgyem
Exeggcute
Feebas
Ferroseed
Finneon
Foongus
Frillish
Gastly
Geodude
Gible
Glameow
Gligar
Goldeen
Golett
Gothita
Grimer
Growlithe
Gulpin
Happiny
Hippopotas
Hoothoot
Hoppip
Horsea
Houndour
Igglybuff
Joltik
Kabuto
Karrablast
Klink
Koffing
Krabby
Kricketot
Larvesta
Larvitar
Ledyba
Lickitung
Lileep
Lillipup
Litwick
Lotad
Machop
Magby
Magikarp
Magnemite
Makuhita
Mankey
Mantyke
Mareep
Meditite
Meowth
Mienfoo
Mime Jr.
Minccino
Misdreavus
Mudkip
Munchlax
Munna
Natu
Nidoran♀
Nidoran♂
Nincada
Nosepass
Numel
Oddish
Omanyte
Onix
Oshawott
Panpour
Pansage
Pansear
Paras
Patrat
Pawniard
Petilil
Phanphy
Pichu
Pidgey
Pidove
Pineco
Piplup
Poliwag
Ponyta
Poochyena
Porygon
Psyduck
Purrloin
Ralts
Rattata
Remoraid
Rhyhorn
Riolu
Roggenrola
Rufflet
Sandile
Sandshrew
Scraggy
Scyther
Seedot
Seel
Sentret
Sewaddle
Shellder
Shellos
Shelmet
Shieldon
Shinx
Shroomish
Shuppet
Skitty
Skorupi
Slakoth
Slowpoke
Slugma
Smoochum
Snivy
Snorunt
Snover
Snubull
Solosis
Spearow
Spheal
Spinarak
Spoink
Squirtle
Starly
Staryu
Stunky
Sunkern
Surskit
Swablu
Swinub
Tailow
Tangela
Teddiursa
Tentacool
Tepig
Timburr
Tirtouga
Togepi
Torchic
Totodile
Trapinch
Treecko
Trubbish
Turtwig
Tympole
Tynamo
Tyrogue
Vanillite
Venipede
Venonat
Voltorb
Vullaby
Wailmer
Weedle
Whismur
Wingull
Woobat
Wooper
Wurmple
Wynaut
Yamask
Zigzagoon
Zorua
Zubat