Hidden teams:
Hold A + Y + C just before the team selection screen appears. The Rad Army and Virgin Blasters teams will be selectable to the left of the Mighty Ducks.

Third jerseys:
Select the Rangers, Mighty Ducks, Blackhawks, Bruins, or Lightning as the home team. Complete team selection and hold A + Y + C while the next part of the game loads. The selected home team will wear their third jerseys and the visiting team will be wearing their home jerseys.