While in NBA 2K16 you can perform a simple one or two-handed dunk, or you can get a little more flashy and perform an alley-oop. An alley-oop is when one player tosses the ball up, and then another catches it and dunks it from the air. The alley-oop requires one major aspect to pull it off correctly: precise timing.
Typically, you’re going to want to use your point guard, shooting guard, or small forward to throw an alley-oop. While setting up the alley-oop in NBA 2K16, be sure to look out for nearby opponents so they can’t reject or swat the ball away.
To perform an alley-oop is simple. Hold RT/R2 while running down the court, either naturally with the entire team or on a fast break, and double tap Y/Triangle button. This will allow you to throw up an alley-oop for your teammate to slam into the basket.
A useful tip to performing an alley-oop is to hold RB/R1 (while stationary) causing one of your teammates to set up a pick and roll play. After he lays out the pick, another teammate will then run towards the basket and this will be a perfect time to take advantage of the defense being caught off guard to throw your alley-oop.