Ferrothorn

Ferrothorn is one of the best tanks in the VGC 2012 metagame, with defensive stats superior to most Pokemon legal in the VGC 2012 metagame. Ferrothorn's strong defenses are backed up by its superb typing, Grass / Steel, which leaves it weak to just two types of attacks, Fighting and Fire. More importantly, it resists many attacking types commonly used in the VGC 2012 metagame, including Water, Rock, Electric, and Dragon. This allows Ferrothorn to switch in with relative ease and set up Leech Seed. Ferrothorn is at its best against teams based around rain, as it walls many common threats to rain teams. Ferrothorn is not without its weaknesses, however. Its 4x weakness to Fire-type attacks make it extremely vulnerable to a number of common Pokemon in the VGC 2012 metagame, and one must be very careful when playing with Ferrothorn to avoid getting caught off guard by one. Lastly, Ferrothorn's paltry base 20 Speed makes it one of the slowest Pokemon in the VGC 2012 metagame. This can be taken advantage of with Trick Room, or you can just accept that Ferrothorn will move last every turn.