Skip playoff games
Select a playoff game and press [Start]. All games will be flagged as finished. Move right and press [Start] again. Repeat this procedure until the final game is reached.
Hidden teams
Press [A], [C], [A], [C], [B], [A], [C], [A], [C] at the team selection screen to unlock the Jaguars and the Cheetahs. Look at the team comparisons before the game to see that they are perfect in everything.