There have been many people who tried to become champions in two weight divisions in the UFC and failing. There are also a bunch of champions that became champion in one division but tried and could not become achieve championship status in two weight classes: 1) Israel Adesanya 2) Lyoto Machida 3) RDA 4) TJ Dillashaw 5) Dustin Poitier (interim at 155 but failed at 145) 6) Robert Whittaker 7) Frankie Edgar 8) Demeterious Johnson ( got pwnt by Cruz) 9) Jose Aldo 10) Luke Rockhold 11) Chris Weidman 12) Anderson Silva ( got smothered by DC ) These are all people that have in 2 or more divisions but was only able to become champ in one of them. They either were not able to take on bigger man or smaller men. Not to mention too many fighters scared to even try. Champ Champ status is rare, so rare only a few modern fighters can lay claim to it. Amanda Nunes Henry Cejudo Daniel Cormier Conor “Notorious” McGregor” GSP These are the GOAT level fighters.