I remember watching an old king of the cage event and one guy claimed to be a fourth degree black belt in Gracie Jiu Jitsu. He got wrecked rather easily.
Kimo touches on this in the interview I posted above that he did with The Hannibal TV a few years back. Apparently Kimo was told a black belt was needed in his practicing discipline at the time to be accepted into the UFC. He says his TKD instructor gave him this so he could compete in the tournament. He says he felt comfortable with his kicks at the time, but was not a 3rd degree black belt in the discipline.
BTW, I heard your shout out on the recent @MMAHistoryPodcast Congratulations man! I’m a big fan of your thread! Keep up the great work!