[Huy]

I disagree with cosmicexplorer. Though there isn't a 'pure defensive' Pokemon VGC, it can be useful to have something beefy. While Ferrothorn may have some glaring weaknesses, it's typing does allow it to have some very effective switch-ins. It's one of the few Pokemon that can boast the ability to switch it on both of Jellicent and Hydreigon's STABs. While a pure defensive set may not be too viable, I don't think a pure offensive set is either. Ferrothorn's terribly small movepool yields a few viable options. Toxic and Leech Seed are still worth mentioning, IMO. You don't need to have it sit there for a few turns to have it be effective. In such a fast paced game, even a little bit of residual damage can help. Leech Seed is also a pretty nice option for Ferrothorn because of it's huge weaknesses. It will probably be switching alot and having the Leech Seed on the field for your teammates could help them, even if it's just a little.