The Tax Beast roams Neopia, stealing Neopoints from the people he meets. When the Tax Beast gets really annoyed, he changes into a more powerful red form known as the Angry Tax Beast, and takes even more Neopoints from his victims! While in that form, he looks like this:
You have lost to the Tax BEAST!!!
Tee hee hee!
It is possible, but not confirmed, that the Tax Beast is a Yurble, given the appearance of the Halloween Yurble.