A good competitive cocancer set

[Lord Windos]

They is always the Bug type weakness to consider, if you are going to run both Chlorophyll users together. While I'm not too connected with online battling, I do know that Siekematter, Harptera, Frothra are big enough threats that having two Pokémon with a Bug Weakness would be troublesome indeed. That goes double with Frothra, as its packing Ice STABs as well! Granted, a good Rock or Fire move will send them packing, but they could always have a back up plan...