Shin Akuma was just revealed as a hidden character, but is basically an overpowered version of Akuma that every other character is weak in comparison to. He can't be used online for a reason, after all. I think this character should be banned in the rules for all runs because of this. Using Shin Akuma basically eliminates the use of any other character because of his immense speed and strength. I think that having runs specifically for him could work, though.

All runners have been using Evil Ryu, Violent Ken or Akuma in their run so it makes no difference. Shin Akuma can be a playable character in the run which shows a faster world record time with him.

These have been the only characters used because nobody new has come along with different ones yet. You used Violent Ken first, next was a different character, Cammy, then another different one, Evil Ryu, which I copied from Tyhandros next because he was a faster alternative to the character I like to use most, Ryu. Then after being beaten at using Evil Ryu, I began to use Akuma. I guarantee someone who knows how to play the game well can use their own characters' combos efficiently enough to get amazing times, but if Shin Akuma is allowed, there is basically no other choice than to use him because his abilities break the game's balance. Like I said, having a specific category just for him would be the best way of including him. This is because it will allow people more freedom in other runs and allow people who want to use this character a place to run with him.