The following are known Action Replay Codes for Cooking Mama 3: Shop & Chop on Nintendo DS (NDS).

Game ID: B3CE-F4186974

All Gold Medals: Press SELECT
94000130 fffb0000
c0000000 00000050
220b7130 00000064
220b7131 00000064
220b7132 00000064
dc000000 00000004
d2000000 00000000

TIME CODES:

Press L for More Time
94000130 fdff0000
220caaed 00000010
220caaee 00000035
d2000000 00000000

Press R For Time Up
94000130 feff0000
220caaed 00000000
220caaee 00000000
d2000000 00000000