(All credits go to the artist and streamer/YT-creator: Kinkymation)

Wandering through a trail of a mountain path you suddenly hear the earth rumbling and splinters of stone flying all around but also grunting

With growing interest you inspect the direction it's all coming from and there you find a Machamp juggling and throwing around boulders, that would explain the rumbling

"A few more reps and then I am done! Hahaha! Training feels good!"

It seems she is too preoccupied to have noticed you yet