Vroom vroom.
I think my favorite thing about making any 'mon is the research I'm sort of forced to do when designing/translating them from 2D Moemon to 3D Koikatsu, like for instance, a small fact about these two are that they are actually a poisonous entity that possessed an old scrap engine. Lots of people don't like the newer designs and make fun of them (I was guilty of this too) but I'm slowly getting used to them, I think.
One particularly thing here is their ponytails, which are actually modelled after their exhaust pipes. I reversed it and made them static, metallic exhaust pipes again, instead of just ponytails with purple highlights. Their arm guards are also actually better suited as wheels, which are actually "rock wheels", so they were modelled appropriately.
Some of Revavroom's pieces turn off with Sub accessories.
Enjoy!