Excadrill

Excadrill is a fast, threatening attacker with Sand Rush, which allows it to outspeed the entire unboosted metagame under sand. It can also function as a setup sweeper with Swords Dance, which lets it easily punch holes in opposing teams. However, being reliant on sand is a significant flaw considering the prevalence of opposing weather teams in Doubles OU. Also, by nature of being a fast attacker, Excadrill is very susceptible to opposing speed control. On top of all this, it's checked by a number of DOU's top threats such as Landorus-T and Celesteela. Overall, Excadrill performs excellently on sand teams, but otherwise, it shouldn't be used over other Ground-types such as Landorus-T and Zygarde.