There isn't any. It's just bad players complaining about the way you play or them making up fake rules about how "supposed" to play in order to appeal to them. A common complaint that bad players tend to make.
Cheating in DOA 101: 1) Using specially modified controllers with turbo input. 2) Using specially modified controllers with memory input that allows you to input a combo with one button. 3) Swapping a player's controller with a duplicate that's got issues during a tournament.
4) Deliberately using characters that are banned from official tournaments. 5) Using a lag switch to deliberately manipulate the input lag in an official online tournament. 6) Lying about match results in the tournament you're participating and competing in.
Well keep those in mind when go to a tournament. I thought you were concerned with something that was said to you.
^That's not cheating. That's a legitimate rule for the clinically sane. To say otherwise is a one-way trip to the nut house!