Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Due to SPL management issues, I'm afraid you shall not be able to cohost Overkill II. Please notify me within 24 hours if you are sure you can still cohost, as I shall otherwise contact somebody else for cohosting.