Yes, it's going to be like this:

A five day DQ (you cool with this Grey?)
Banned moves: Toxic, non-damage healing moves (including painsplit). Add anything you like Grey.
Number of pokemon: 3. We'll both send them to the ref and he'll decide which pokemon and who starts off first.
Arena:

Blackthorn City: We all know the place and so does the ref. He'll gladly put us somewhere in Blackthorn city to fight; and then teleport us to another city in Hoenn or Sinnoh (per three rounds).

Any refs?