This is Football - Platform: Playstation 1

Small players
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Press Square, R2, Right, L2, L1 at the main menu, then begin an exhibition game.

Big heads
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Press Triangle(2), L2, L1(2) at the main menu, then begin an exhibition game.

Alternate clothes
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Press Circle, L2, Left, R2, Triangle at the main menu, then begin an exhibition game. 

Black/white mode
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Press Up, R1, L2, R1, R2. 

Head as ball
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Press Left, L1(3), R2 at the main menu, then begin an exhibition game.

Topless
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Press Down, R2(3), Triangle at the main menu, then begin an exhibition game.

Small heads
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Press R2, Down, L2, L1, Circle at the main menu, then begin an exhibition game. 

70's mode
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Press L1, R2, L2, Circle, R1 at the main menu, then begin an exhibition game.

Toddlers
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Press Right, Square, Up(2), R2 at main menu, then begin an exhibition game. 
Players and ref will be toddlers.

Full attributes
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Use all available attribute points when editing a player. Save the team 
that was just changed, then return to the team selection screen. Select 
the same team to be edited, and you will have more attribute points to 
assign to a player. Repeat this until all players have full attributes.