There are Two Different Set of Rules.

The First set is for Trainers
Only Three Pokemon are allow.
Only Four Moves are allow unlike most of the Scarison Region where the pokemons can learn more then Four moves and still use them.
Pokemons area only allow hold items and not clothes.
Pokeballs with Effect damage will be vod and no damage will be substain even if you use them.

The Second Set of Rules is for Battle Area's.
The Battles will be Set as A,B,C, Ect
Example Battle Area A or Battle Area B
This is so that mubital Trainers can battle in similar areas and not interfere with each other.
Each Area will be equip with the following
Theme base
Type double effect.(this is for what it ups and depends on the area.)
Type - effect(this is for what it - and depends on the area.)
Lookout for(this is for things that will damage the both pokemon. but it is still being work on so as for now it not a option. )
weather effects
First appear in

For example
Battle Zone A
{Image of the battle area}
{Name of type } is double
{Name of type } - effect
Look out for {name of object}
weather effect