Machamp

With Snorlax being the king of GSC, Machamp seems like a pretty good idea given its mighty Fighting STAB. However, it takes as much as 49% switching into Snorlax's Double-Edge, making it a shaky check for the big lug. However, while Machamp is a shaky Snorlax check, on offense it's a monster -- half of the Pokemon on most teams are weak to Fighting-type attacks, severely limiting what can switch into Machamp. Furthermore, a few teams do not even have a Fighting resist, allowing Machamp to steamroll these teams when it comes across them if it manages to OHKO Skarmory with a +1 critical hit Cross Chop. Cross Chop has a 20% critical hit rate after factoring accuracy, so going for the critical hit is a viable strategy and not just a pipe dream. Machamp also has decent 90 / 80 / 85 defenses, allowing an all-out attacker much more leeway to switch in than the similar Marowak, and permitting the use of a more defensive RestTalk set to tank mixed sweepers. Machamp does have its flaws, though. Its low Speed, Spikes vulnerability, lack of useful resistances, and good-but-not-great defenses make it extremely vulnerable to simply being beat down upon, and it's also often the victim of bad luck and PP issues thanks to Cross Chop's 80% accuracy, meager 8 PP, and dependence on the critical hit to break walls such as Skarmory.