Well, there would be the usual rules like:
No Godmodding
No Bunnying without permission
Stay active
Follow all PokeCommunity rules and guidelines
Romance is (not allowed/allowed, but keep it PG 13)
And there would also be something like:
To show you have read the rules, put 'BLAHBLAHBLAH' somewhere in your SU.
And the types i'd like for the gyms are: Ghost, Ice, Fire and either Dark or Grass. Do you need any help with the story line or such?