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 Riley as your fighter. Once the fight starts, let Riley 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 Riley 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 Riley Burden (yeah. Sounds familiar huh?)

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 Tyl....eh. Riley punching you to the ground to a bloody pulp.
Press whenever the other fighter is close to you. That is pretty much it.