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(M)Must Be On ECBCA14C14318EDC

Inf HP P1 4CA2CCC81456E404
4CA2CCCE1456E404

Inf HP P2 4CA2D1A01456E404
4CA2D1A61456E404

Inf Money 1CA24054144F25CC

Low Def P2 4CA2D1A81456E7A6

Low Int P2 4CA2D1A41456E7A6

Low Pow P2 4CA2D19E1456E7A6

Low Spd P2 4CA2D1A21456E7A6

Max Def P1 4CA2CCD01456E404

Max Def P2 4CA2D1A81456E404

Max Guts P1 3CA2CCD41456E788

Max Int P1 4CA2CCCC1456E404

Max Int P2 4CA2D1A41456E404

Max Pow P1 4CA2CCC61456E404

Max Pow P2 4CA2D19E1456E404

Max Spd P1 4CA2CCCA1456E404

Max Spd P2 4CA2D1A21456E404

No Guts P1 3CA2CCD41456E7A5

No HP P1 4CA2CCC81456E7D7
4CA2CCCE1456E7A5

No HP P2 4CA2D1A01456E7D7
4CA2D1A61456E7A5

Monster Rancher 3 v1.1 Codes There were two versions of this game released, though you may not be able to tell by looking at the packaging or the game itself. If you find that the above codes do not work try the v1.1 code listed below.
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Monster Rancher 3 v1.1 Codes

(M) Must Be On 0E3C7DF21853E59E
EE91D902BCD674BA

Inf Money DEA73822BCB8DDC2

Inf HP P1 CEA7AB9EBCA99E6A
CEA7ABA0BCA99E6A

No HP P1 CEA7AB9EBCA99BB5
CEA7ABA0BCA99B83

Inf HP P2 CEA7A9F6BCA99E6A
CEA7A8F8BCA99E6A

No HP P2 CEA7A9F6BCA99BB5
CEA7A8F8BCA99B83

Max Pow P1 CEA7AB98BCA99E6A

Max Int P1 CEA7AB9ABCA99E6A

Max Spd P1 CEA7ABA4BCA99E6A

Max Def P1 CEA7ABA6BCA99E6A

Max Pow P2 CEA7A9F0BCA99E6A

Max Int P2 CEA7A9F2BCA99E6A

Max Spd P2 CEA7A9FCBCA99E6A

Max Def P2 CEA7A8FEBCA99E6A

Low Pow P2 CEA7A9F0BCA99B84

Low Int P2 CEA7A9F2BCA99B84

Low Spd P2 CEA7A9FCBCA99B84

Low Def P2 CEA7A8FEBCA99B84

Max Guts P1 CEA7ABA2BCA99BE6

No Guts P1 CEA7ABA2BCA99B83

Max Guts P2 CEA7A8FABCA99BE6

No Guts P2 CEA7A8FABCA99B83