So, this:
Battle Format:
* You can change your team this tournament.
* While inviting opponent: Double, Flat Rules
* Best of 1 For All Rounds
* Best of 3 For Semi-Finals and Finals
Rules:
Each Pokémon may hold an item, though no two Pokémon may hold the same item.
Players must avoid the use of potentially inappropriate, obscene, or otherwise offensive words or phrases when naming their Trainer or their Pokémon.
Pokémon may not hold a Mega Stone.
A player’s team cannot contain two Pokémon with the same Alola Pokédex number.
Pokémon may only use moves that have been learned through normal gameplay or from an official Pokémon event or promotion.
Pokémon may have Hidden Abilities. o Pokémon may use Z-Moves.
Pokémon must have the black clover on their summary screen.
Pokémon Level 50 during battle.
Players may use Pokémon from the Alola Pokédex, from No. 001–204, No. 206 – 288 and No. 293 – 299.
Source:
https://auslove.tv/tournament-19/