Game shark codes:

Master dode "must be on"
EC851E48143B2F2C 

All 1st places                           1C8C81701355E6A6                                         1C8C81741355E6A6                                         3C8C81781456E7A6 

All bike upgrades                        3C8C7E3F1456E7A6                                         4C8C7E501456E6A6                                         7C8C7E441453E7A6                                         3D9882291456E7A5 

All weapons                              7C8C7E381453E7A6                                         3D9882291456E7A5 

Infinite shield and ammo
3C8A4FA01456E7A8

Start on final league
DC9186270441B2DF                                         1C8C7EF01553E4A5                                         1C8C81701355E6A6                                         1C8C81741355E6A6

Max bank
1C8C7E2C17E9C70C 

Max earnings
1C8C7E3017E9C70C