Beach Stadium

Select "Homerun Race" mode, then press X, Circle, Triangle, Square on controller two at the stadium selection screen.

Oldboys Team

Select "Homerun Race" mode, then choose "Single Play". Then, press X, Circle, Triangle, Square on controller two at the team selection screen. The Oldboys will now be selectable.

Oldboys Team in Team Edit Mode

Press X, Circle, Triangle, Square on controller two at the uniform selection screen. The Oldboys will now be selectable.

Sea Stadium

Select "Homerun Race" mode, then press Square, Triangle, Circle, X on controller two at the stadium selection screen.

Sky Tower Stadium

Select "Homerun Race" mode, then press X(2), Circle, Up, Circle, Down, Triangle, Square on controller two at the stadium selection screen.