I currently caught a Drilbur (F) who I named Mao in Black2 and I'm currently grinding her. When Mao evolves to an Excadrill, should I keep Hone Claws or replace it with Swords Dance?
Certainly Swords Dance. Your obvious STABs, Iron head and earthquake, are 100% accurate. Thus, you don't need accuracy boost. And Swords Dance gives +2 attack, which is really powerful. After a single swords dance, you should be able to sweep through every NPC. Hope I Helped!