Just to make this old ass trophy easier...
There's a glitch fo infinite SP on your My Player that you can use to max out your stats. Simply get about 10-15 SP above the requirements to buy a Jump Shot animation, then buy that animation.
It will give you negative SP, allowing you to max everything out and buy any animations/signature skills that you want for free.
So, ball out everyone (your SP will revert back to being positive once you go to a certain screen, but your upgrades will stay)