"What is that?" Xeno asked aloud, pressing his ear to the tunnel wall. Soon as he could hear better the answer became obvious, and the sableye began rushing back up the tunnel he'd made. It was deep, too deep apparently, and up above the little bit of light coming from the opening of the tunnel disappeared. Panic filled Xeno's mind as he crawled up onto the roof of the tunnel he'd made, watching as a few loose rocks tumbled past him. "Damn," he sighed, looking towards what had been his exit. 

Hastily Xeno began crawling around on what short stretch of tunnel he had left, listening for something that might indicate a nearby cavern. Ears twitching, he began to pick up something, and started digging. He had more energy now, having found a small coal deposit, and silently cursed himself for not pursuing a food he didn't need to risk killing himself for.

Slowly the noise grew louder, until eventually the rock gave way by itself and Xeno tumbled down into a cavern. Nimbly he managed to recover from the fall and land on his feet, arms out for balance as dust and small chunks of rock fell from the ceiling. There were pokemon in here as Xeno had assumed, and quickly he began looking for an exit other than the one above him which didn't really lead anywhere.