To unlock the F.C. Sega team, go into arcade mode and press start on the following teams: France, Chile, South Africa, England, Germany, and Argentina. The F.C. Sega icon will appear above the second column of teams. Select it, and then beat the arcade mode (you can continue as many times as needed). Now F.C. Sega will be permanently available in the non-arcade modes under a new menu called "SP".