The following are known Gecko Codes for Bass Pro Shops: The Strike on Nintendo Wii (Wii).

Millionaire [Patedj]
04574EDC 49742400
This code makes you a millionaire.

Reputation points [Patedj]
04574F17 000000xx
045ABE07 000000xx
Replace xx with the reputation needed for the map.

Unlockables

Maps unlocked (Thanks to Jackal) [Patedj]
005750F4 00130001
This unlocks all of the maps.

Last boat unlocked and equipped [Patedj]
05204EE4 00000000
05204EEC FFFFFFFF
05204F84 00000001
05204F88 00000001
05204F8C 00000001
Equips the best boat.

Fish Magnet

Fish Magnet except for the last map (Thanks to James0x57) [Patedj]
2861621B BFFFF400
04CB2DDC 01599999
04CB2DD8 3F599999
E0000000 80008000
This can influence the fish to attack the lure faster than usual and for further distances when you press/hold B.

Fish Magnet for the Last map [Patedj]
2861621B BFFF4000
04C5BA78 3F599999
04C5BA7C 01599999
E0000000 80008000
Same as above but for the last map. Sometimes this code doesn't work for the last map.

Timers (Warning, do not activate during leisure fishing. Exiting will freeze the game)

Lake Amistad timer/on [Patedj]
2061621A 00000C00
04A8E100 000004B1
E0000000 80008000
Pressing (A) + (B) will reset the timer to 20 mins

Lake Amistad timer/off [Patedj]
2061621A 00001400
04A8E100 00000000
E0000000 80008000
Pressing (-) + (B) will stop the tournament. If done right away, you will win the tournament. When you press it away from the dock this will put you in penalty.

Lake Ouachita/Fork timer/on [Patedj]
2061621A 00000C00
04A8E0FC 000004B1
E0000000 80008000
Same as above but for the second lake

Lake Ouachita/Fork timer/off [Patedj]
2061621A 00001400
04A8E0FC 00000000
E0000000 80008000
Same as above but for the second and third lake.

Lake Wiley/Oneida timer/on [Patedj]
2061621A 00000C00
04A8E0F8 000004B1
E0000000 80008000
Same as above but for the forth and seventh lake.

Lake Wiley/Oneida timer/off [Patedj]
2061621A 00001400
04A8E0F8 00000000
E0000000 80008000
Same as above but for the forth and seventh lake.

Lake Guntersville/Champlain/Pickwick/Toho timer/on [Patedj]
2061621A 00000C00
04A8E0F4 000004B1
E0000000 80008000
Same as above but for the fifth, sixth, eighth, and ninth lake.

Lake Guntersville/Champlain/Pickwick/Toho timer/off [Patedj]
2061621A 00001400
04A8E0F4 00000000
E0000000 80008000
Same as above but for the fifth, sixth, eighth, and ninth lake.

Lake Table Rock/on [Patedj]
2061621A 00000C00
04A8E104 000004B1
E0000000 80008000

Lake Table Rock/off [Patedj]
2061621A 00001400
04A8E104 00000000
E0000000 80008000

Penalty Time STOP for Lake Amistad [Patedj]
04A8E10C FFFFFFFF
This will keep the timer at 0:00 and will stop any Lbs to be taken off your total.

Penalty Time STOP for Lake Ouachita/Fork [Patedj]
04A8E108 FFFFFFFF
Same as above but for the second and third lake

Penalty Time STOP for Lake Wiley/Oneida [Patedj]
04A8E104 FFFFFFFF
Same as above but for the forth and seventh lake

Penalty Time STOP for Lake Guntersville/Champlain/Pickwick/Toho [Patedj]
04A8E100 FFFFFFFF
Same as above but for the fifth, sixth, eighth, and ninth lake.

Penalty Time STOP for Lake Table Rock [Patedj]
04A8E110 FFFFFFFF
Same as above but for the last lake

ASM

Fish Magnet except for the last map (Thanks to dcx2 for correcting the ASM) [Patedj]
041DB468 C07F73D8
2861621A BFFF4000
C21DB468 00000003
3D803F59 618C9999
919F73D8 C07F73D8
60000000 00000000
E0000000 80008000
Pressing B will trigger the hook, attracting the fish.