Super men's team:
Enter the team selection screen. The pointer should be at the top left corner. Press Down, Right, Left, Down, Down, Right, Up. The "Balanced Team" should now be selected, and your team name will change to "WHEN ISNT IT?". Change the team name to WHEN IT IS. (including the period).

Super women's team:
Select the "Make Team" option from the main menu. Then, press Down, Right, Left, Down(2), Right, Up(2), Down, Up, Down, Up. The "Veterans" team should be highlighted. Press A to change your team name to "WHAT IS A WREN?". Change the name to A BIRD. (including the period). The name will change again to "WHEN ISNT IT?". Change the name to WHEN IT IS. (including the period).