I'd like to disagree with Lucario for C-Rank. Now, I don't really have anything to say about the agility set, but you mention that the Swords Dance set is slow. You realize that one of Lucario's main selling points is it's powerful priority, right? Once it gets a boost, which isn't too difficult thanks to it's great resistances and Justified, it can plow right through teams if their physical wall is gone. It can even run dual priority with Bullet Punch to get past things that resist/are immune to ExtreemSpeed. It is held back by it's frailness, I'll admit that, but that's why it's B-Rank. If it was bulkier it would have a solid shot at A-Rank.