Spirit-X

Get RBK Challenge trophy: Finish RBK Challenge Slam Dunk Contest
Get New York trophy: Finish the New York slam dunk contest
Get Legendary Status trophy: Finish the Legendary Status slam dunk contest
Get History Lesson 1 trophy: Finish the History Lesson Part 1 slam dunk contest
Get History Lesson 2 trophy: Finish the History Lesson Part 2 slam dunk contest
Get Future Of Flight trophy: Finish the Future Of Flight slam dunk contest

Unlock all NBA legends, Street legends, Court Creator items, and store items:
Win the Street Challenge mode to earn 50,000 street trick points.
Participate in the tournament on the 10th week on Sunday.

Unlock Dime in Street Challenge mode:
Beat Dime's team in the finals of the "Can You Spare A Dime?" tournament

Unlock Phat in Street Challenge mode:
Beat Phat's team in the finals of the "Fat Kid on the Block" tournament

Unlock Biggie Littles in Street Challenge mode:
Beat Biggies team in the finals of the The Cage torunament at NY

The Beastie Boys:
Purchase for 500 points at the rewards screen.

Easy points in dunk contest:
During the dunk contest, hold L + White + R + A buttons before the
3-point line, then run up just for a second and push B.