At the Main Menu, scroll down and select "Features", then "Extras, then "Codes". At the codes screen, unlock the following dunks by entering the correspinding codes. Note: After entering the code, load up the Sprite Slam Dunk Showdown and check the Dunk Help menu to view how to perform the new dunks:
-For The Arrival, don't play defense. Instead, maximize offense time. Since you don't have to win, switch to man-to-man defense and control the player guarding the ball handler. Simply move away from the player to get him to shoot as soon as possible.
-If you need more time to score points, try fouling players while on defense to get the ball back.
-For The Shootout, after completing the required number of assists, minimize the Hawks offense time by holding on to the ball as long as you can.
At the start of a season you get 10 new drills. Before beginning your new drill, subtract on point from you 3 point stat, which gives you around a 1000 skill points to spend on anything else. Then, complete a shooting drill by attempting only 3s to get your 3 point attribute maxed out again. This is an easy way to get extra skill points. You can do this anytime you get a drill.