Unlock Stadiums 1, 2, 5, and 11

At the Arcade Mode menu, press B, Up, Y, Left, A, Right, Down.

Unlock Stadiums 3, 7, 10, and 15

At the Arcade Mode menu, press B, A, Left, Left, Start, B, A, Left, Left, Start.

Unlock Stadiums 8, 13, and 16

At the Arcade Mode menu, press B, A, Right, Start, B, A, Right, Start.

All-Star Teams

At the Arcade Mode menu, press Start, A, Y, Up, Right, B, A, Down.

Silicon Dream Teams

At the Arcade Mode menu, press Y, A, B, B, A, Down, A, B, B, A, Down, Up.

Small Players

At the Arcade Mode menu, press Down, Up, Left, Left, A, Right, Down, Start.