Another of the most memorable fights in this arc imo. First C18 against Goten and Trunks and then against Mr. Satan. C18 is really a underutilized character, but she's great. I like that her morality isn't the same as most of our other protagonists.
In truth, I'd probably prefer Hercule getting exposed as the fraud he is but I do admire 18's hustle. I always loved that she used him to get even more riches.