Here are some cheats and tips for the game Powerful World Soccer 3.
All-star team:
Press Up, L, Up, L, Down, L, Down, L, Left, R, Right, R, Left, R,
Right, R, B, A, Z + Start at the title screen.
Big head mode:
Press C-Up(2), C-Down(2), C-Left, C-Right, C-Left, C-Right, B, A,
Z + Start at the title screen.