A hippo-based Grimm was just screaming to be made.

Seriously, hippos are scary as FUCK. The fact that a Knasher will even kill and eat other Grimm is literally based on the fact that hippos kill more animals in Africa than ANY other animal. They beat up crocodiles, have been known to also EAT other animals completely disproving the idea that they're herbivores, and have even been recorded eating other hippos as well.

Side note, the Knasher is based on the word "gnash" which is the act of biting and grinding your teeth. Except apparently I completely forgot how it was spelled, oops