For the longest time i just did not bother with the hacks of champion edition for some reason,but deceided to finally check them out recently. Those are cool!
As far as i know there is: Rainbow,Red Wave,Yellow Label/YYC and Koryu hacks.
My favorite one that has the neat improvements while not being too over the top is Red Wave(I think). Being able to pull off moves instantly like guiles flash kick without chargeing,and even being able to do it in the air just as easily is cool. Also pressing start button and changeing to any character during the match is neat. Also “homing” projectiles.
The most over the top hack is the crazy KORYU. Where when Ken or Ryu does a dragon punch,it litters the air with fireballs. You can also do slow motion fireballs which is really cheap,as you can litter the screen with them and the opponent will run into to them no matter what. The cheap AI seems to take advantage of this.
Also in some games its like the characters can practically “SW-Force throw” you.Meaning you can be across the screen from a character, and they can do the throw animation and you’ll take damage.Especially annoying with zangiefs piledriver,which you do not seem to be able to escape even if your character is in the air. weird stuff but cool