Not much mentioned of this elusive bot, but here's Corndog's description of it in March 2016.
"Thwampus - That's right... The Wampus has a crazy cousin... He's even more elusive, and gets even crazier when you beat him!" -Corndog
A picture has been leaked of the car that he will use.
On June 12, 2018, WPS's team description was changed from "Be a Wampus!!" to "Be a Wampus!! or a Thwampus..." hinting its upcoming release.