The following are known Action Replay Codes for Extreme Pinball on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

Infinite Balls Knights
80049edc0000
8004c9340000

Infinite Balls Monkey Mayhem
80055b3c0000
800583fc0000

Infinite Balls Rock Fantasy
800468400000
80049e080000

Infinite Balls Urban Chaos
800483680000
8004b0700000