The Phalanx, you are challenged to Solo Clay with a Drilbur, without using any x-items. It must be a Drilbur, NOT an Excadrill. You are not required to use Drilbur beyond this challenge
Good luck, that should provide you with a nice challenge.
@IAR yeah I know it's fairly similar, basically I felt like doing something different so I thought of this, basically a scramble for restrictions and challenges instead of Pokemon. I figured it'd be nice for people who like to pick their own Pokemon but still want a harder and different run but also want something different than a Nuzlocke. So this thread was born! Seems like people have taken to it so far :)