Team MVP Yukichan:

Enter arcade mode and highlight Yugoslavia (don’t select the team with the

A button). Press start, then highlight USA and press start, highlight Korea

and press start, and then highlight Italy and press start. Team Yuckichan

should appear on the top left of the screen.

Unlock New Stadiums:

Hold start and press A at the stadium selection screen.

Choose F.C. Sega Team:

Enter arcade mode. Highlight and press start in the following teams France,Chile,SouthAfria,England,Germany

and Argentina after that you can choose F.C SEGA TEAM {ABOVE BRAZIL}

Thanks to Revolution reader Tr and fernando lozano!