This does not need to be a rivalry match.
UNIVERSE > CUSTOM UNIVERSE > EDIT SUPERSTARS
Select any wrestler preferrably a babyface (goodguy). Daniel Bryan, John Cena etc
Scroll Down to Personality Traits Which ever Wrestler you select when you click Personality traits it tells you which is there Dominant trait. EG Daniel Bryant's dominant trait is Perseverant
Now this is important. Scroll Down to the Aggressive trait and keep on raising it until you see the dominant trait change, so Daniel Bryans/Cena's will say Aggressive, Now adjust that bar so that it goes back to the dominant trait but so that it is only one click away from changing to agressive.
Go to a Match (Within WWE UNIVERSE) select any one on one match from the list and hit RB which allows you to edit the match or participants.. Select to customize the match rather than just the participants.
Now Chose a No holds barred Match, Select your fighter and any opponant. Now beat the holy bejeesus using any and all weapons on your opponant. After the match select end. Go back to the Edit Superstars and you will see that the dominant trait has changed and that the aggressive bar is almost maxed.
To get the next achievement
The Attitude Adjustment achievement in WWE 2K16 worth 53 pointsWWE Universe - Max any personality trait of a Superstar/Diva by playing in a match. Have another match, repeat the process and again use all the weapons and this should max out the Aggressive bar.