Ferrothorn

Ferrothorn's decent 74 / 131 / 116 bulk combined with access to reliable recovery in Synthesis and useful status moves such as Spore and Stealth Rock make it one of the premier walls of STABmons. In addition to this, Ferrothorn is both a fantastic check to Kyurem-B and one of the hardest Pokemon to switch into, as it has access to both Spore and Leech Seed to wear down its foes. Ferrothorn also has a decent Attack stat, and it can choose between a strong Gyro Ball, which hits hard thanks to its low Speed stat, and Power Whip, which allows it to hit Water-types such as Quagsire and Rock-types such as Tyranitar.

However, although Ferrothorn has a decent typing that allows it to switch in on threats such as Azumarill, its typing also gives it a troubling 4x weakness to Fire-type moves from Pokemon such as Heatran. In addition to this, Ferrothorn has four-moveslot syndrome, and it can be hard to fit in all of its options on one set at times. Thundurus's presence is a major issue, as it can shut Ferrothorn down and set up on it. Ferrothorn also has a bad matchup against defensive teams due to its reliance on Iron Barbs, Leech Seed, and King's Shield to deal damage and the prevalence of Mega Sableye.