The following are known Action Replay Codes for Mary-Kate and Ashley: Winners Circle 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

Max Ribbons
8009a870270f

1 Horseshoe needed To Have All
d01fc9c40001
801fc9c4001a

1 Flag Needed To Win
d009a42a0001
8009a42a0012