Cruz Brothers

From the main menu, select Brawl Night if you have a single controller or Vs. Mode if you have 2 controllers.

If in Brawl Mode, select the first fight against O’Bryan, then select Joe as your fighter. Once the fight starts, let Joe get beat up a bit and give some punches to build up his power in the bottom left corner. Once it shows a crown in the bottom left, hit to initiate a Super and the achievement should pop.

If you are using 2 controllers, select VS. Mode. Select Joe as your character with controller 1 and any character with the second controller. Select the venue to proceed. Use controller 2 to beat on your controller 1 to build controller 1’s power. When controller 1 gets a crown in the bottom left, hit to initiate a Super and the achievement should pop.

Very simple. Select Joe (or Dying Joe as he is officially named)

Whenever you are in a fight, you need to fill up the "Super meter", which in games like Street Fighter is the Hyper Combo or the X ray move in MK9.

In the left corner you see P1 at first. After that when you punch and get punched the meter will fill. Whenever you see a blinking crown and are close enough you do your super. (which is Joe breaking the other guy's arm and leg)
Press whenever the other fighter is close to you. That is pretty much it.