Bort was an extremely successful mutant wrestler, and was kept as a pet by Dr. Srivaramen. While Lewis and Simon were testing mutated mob behaviour on Endermen, Bort had gotten out of his holding pen and began to attack the duo.
Later, when Puffy Clouds was fed TNT and gunpowder by Simon, Bort attacked Puffy. After exploding, Puffy had successfully taken down the now deceased mutant wrestling champ.
For the mysterious Christmas barbecue party, that some of the staff held, they hired Bort as a bouncer. When Lewis and Simon tried to get in he didn't let them and proceeded to chase them (slowly) when they acted suspicious.