And with the Manny Pacquiao VS DK Yoo fight many are saying and also the promoters to Manny Pacquiao to not fight DK Yoo and instead fight a legit boxer, like Floyd Mayweather, or Conor McGregor in an exhibition match than having it on a non-boxer and doesn't have experience in a fight like DK Yoo,
I think they wouldn't allow Manny to fight with new boxers because that will not be considered as a fair match. Since it will surely be between boxing legends with huge name in the industry. As what we have heard, it could be Mayweather which I think is a good opponent for Manny. He's also not getting any younger to face younger boxers.
What do you mean? In an exhibition fight, anything goes, retired MMA vs Boxer or any other discipline. So there is no exception.
Not sure if Floyd is willing to still fight Manny until there is a big money in the table. Maybe some rich oil tycoon from Middle East are willing to sponsor it. If my memory serves me right, Floyd last fought in Saudi. Anyone, we will see, there is Floyd vs Conor floating around as well.