To play against the secret teams (Smash Stars - Melody, Kick Stars - Star Team and Dunk Stars - Golden USA) you must reach 200.000 points before winning the finals.
Unlock New Teams/Player
After inserting 1997 credits, the title page changes with a girl and a dog on the left side of the screen. This unlocks a new team/player for each game.
Smash Stars - Melody Love
Dunk Stars - Golden USA
Kick Stars - All Stars