Pause your game while at the league office, and then press:
Right, Right, Right, Up, Up, Left, Left, Left, Left, Right, Up, Up, Up, Up, Down

Pause at the school screen and enter the following:
Right, Down, Left, Up, Left, Left, Left, Left, Y, Left

Pause at the school screen and enter the following:
Right, Down, Left, Up, Left, Left, Left, Left, Y, Right

Pause Game at League Office and press these buttons:
Right, Right, Right, Up, Up, Left, Left, Left, Left, Right, Down, Down, Down, Down, Up

Pause Game at School and press these buttons:
Right, Down, Left, Up, Left, Left, Left, Left, Y, Y, Y

Pause game during combat to control the camera then press:
Right, Down, Left, Up, Left, Left, Left, Left, Up, Up, Up, Up