Slam City
Super slams:
Press B, A, Left(2) before Fingers passes the ball to perform easy super slams. 

Bonus FMV sequences:
Press C at the title screen to enter the options menu. Perform the following controller actions in the options menu. Hold A + B + C (in order). "B15" will be displayed in the top left area of the screen. While holding A+ B + C, press Up. To view another FMV sequence, hold A + B + C and press Start at the title screen. 

Hidden message:
Insert the game disc into an audio CD player and play track 2. A backwards audio track with the repeating phrase "number nine" (in reference to The Beatles song) can be heard.