Do your students need more reinforcement comparing and contrasting protists, fungi, and microbes? If so, then this taxonomy tournament bracket challenge then is for you! Contestants from three different kingdoms of life along with a few viruses have registered for this tournament and are ready to compete! Will your students be able to accurately determine the winner? I provided an extra two-page overview of the contestants, which can be offered as a refresher and as a supplementary guide if your students need it. The answer key is also included. This document, like all of my other published lessons, can be edited. I included two versions of the student printout in the event the lines of the first round contestants appeared "dashed" in older Microsoft Word versions. May the games begin!