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The Standard ShellSmash Cloytser will work fine, of course you could replace the Water-type move (since it's weakened by the Sun) for Hidden Power [Fire] or Rapid Spin even.
Also - might I STRONGLY suggest you leave the TRC - they are a Rival group to Aero and the SSIS... The BTS league is in the SSIS, but probably will be sponsored by Aero as well...