Banned Pokémon:
Arceus (all forms)
Darkrai
Deoxys (all forms)
Dialga
Genesect
Giratina (all forms)
Groudon (all forms)
Ho-Oh
Kyogre (all forms)
Kyurem (all forms)
Landorus (regular)
Lugia
Lunala
Mewtwo (all forms)
Necrozma Dusk Mane
Necrozma-Dawn wings
Ultra Necrozma
Palkia
Rayquaza
Reshiram
Shaymin-Sky
Solgaleo
Xerneas
Yveltal
Zekrom
Zygarde with power construct

You can have up to >ONE< of these pokemon on this list on your team:
Aegislash
Marshadow
Pheromosa
Naganadel
Blaziken
Blaziken-Mega
Lucario-Mega
Kangaskhan-Mega
Salamence-Mega
Metagross-mega

Banned Items:
ALL Z-crystals
Gengarite

Banned moves:
Baton Pass
Minimize
Double Team
Fissure
Guillotine
Horn Drill
Sheer Cold

Banned abilities:
Arena Trap
Power Construct
Shadow Tag
Moody

Clauses:
Sleep Clause
->If a player has already put a Pokemon on his/her opponent's side to sleep and it is still sleeping, another one can't be put to sleep.
Endless Battle Clause
->Players cannot intentionally prevent an opponent from being able to end the game without forfeiting.