Sophie and Grady were looking for a lost Sasquatch in Exile when Sophie accidentally stumbled upon a female alicorn (Silveny). Sasquatches' smells are so strong that after Grady crawled around in a Sasquatch den, Sandor couldn't recognize his scent. In some cases, calling someone a sasquatch was used as an insult in the series.
Sasquatches are tall, shaggy, green creatures with beady eyes and bright green feathers. They have beak-like noses, and due to a feature on their hands and feet, they are able to climb trees (leaving scratch marks). They are also capable of swinging on vines.