Rizal
This is the Master Code for the GBA SP Gameshark, Pokemon FireRed. I personally guarantee it will work and allow you to use any of the codes I post here in future.
9820F6 AE8203
51F0D8 DF70D1
407403 064659
-------------------------------------------------
Change Wild Pokémon Level [North America]
Must have this on: 754ED27A 8B1BEFEE
Level 1: 8BB602F7 8CEB681A
Level 2: 00939804 4086FF3B
Level 3: 2BD38F05 D5A578B1
Level 4: 5685B807 3787DACB
Level 5: A9E4EA45 3651CADD
Level 6: E37D365E D7EAB6AB
Level 7: 51374592 F7A27768
Level 8: A08DD229 10D187E3
Level 9: D84D4738 70F68A80
Level 10: 4C6C2B8C CD0528EB
Level 11: 1F1785AC 433A6DC2
Level 12: B4F6F07D 8F56BA40
Level 13: E32BCCB1 07782CD6
Level 14: D4ABF236 D713B4E0
Level 15: 3CD3295F 921F1D1C
Level 16: B9C51F47 95395496
Level 17: 784E8A1B 83A3E0EF
Level 18: 902D754C 80AFE55F
Level 19: 9D362B43 96A4D044
Level 20: 8C434E48 F703A9E1
Level 21: CC449941 F0BBB13A
Level 22: CEDDB323 FFA50BB1
Level 23: 4688F12F FF9DBE10
Level 24: F6DA2242 E2EDA644
Level 25: 2D02A8EA 9B748C49
Level 26: 9D2895EF 6A2BEE59
Level 27: 1BB7262E 80989B57
Level 28: 79693C0B A82C5A23
Level 29: B98E773A D6E0D6AD
Level 30: A457FA67 BCD9C478
Level 31: 881976CC 20B658FF
Level 32: 0073F88A 0A4E81B6
Level 33: 792E7A0F F4BF8DDB
Level 34: 0965B686 64E170F2
Level 35: C70600E8 789A0DAC
Level 36: 0CF8B98B 706A26BE
Level 37: 2E7A201E 5EDBDEE3
Level 38: 9B169FF5 CBABA5A6
Level 39: 7928BBA3 C55BBEAB
Level 40: 155D7103 D66B8A15
Level 41: 7B9DFCEF 830C6BDA
Level 42: BA697C16 93D76910
Level 43: CCED8F7A 8EC0F43C
Level 44: 58EAABBC FC3CA9C2
Level 45: 710D8A2D 45E999F3
Level 46: 2EC0F0EC 6B1A061F
Level 47: E951E67F BFD89E41
Level 48: B743EDBF B82BB83A
Level 49: 4BF9418B EFC87C19
Level 50: CBEB73A3 90A08906
Level 51: 9818C0C6 E03F8431
Level 52: 8A448A37 583B581C
Level 53: 1855C5A3 70B67919
Level 54: 72898F14 3F2CD864
Level 55: 3E7B9D1E 5CE7F0DC
Level 56: B62795CF CEAE6A48
Level 57: 05858D31 D4449EFE
Level
9820F6 AE8203
51F0D8 DF70D1
407403 064659
-------------------------------------------------
Change Wild Pokémon Level [North America]
Must have this on: 754ED27A 8B1BEFEE
Level 1: 8BB602F7 8CEB681A
Level 2: 00939804 4086FF3B
Level 3: 2BD38F05 D5A578B1
Level 4: 5685B807 3787DACB
Level 5: A9E4EA45 3651CADD
Level 6: E37D365E D7EAB6AB
Level 7: 51374592 F7A27768
Level 8: A08DD229 10D187E3
Level 9: D84D4738 70F68A80
Level 10: 4C6C2B8C CD0528EB
Level 11: 1F1785AC 433A6DC2
Level 12: B4F6F07D 8F56BA40
Level 13: E32BCCB1 07782CD6
Level 14: D4ABF236 D713B4E0
Level 15: 3CD3295F 921F1D1C
Level 16: B9C51F47 95395496
Level 17: 784E8A1B 83A3E0EF
Level 18: 902D754C 80AFE55F
Level 19: 9D362B43 96A4D044
Level 20: 8C434E48 F703A9E1
Level 21: CC449941 F0BBB13A
Level 22: CEDDB323 FFA50BB1
Level 23: 4688F12F FF9DBE10
Level 24: F6DA2242 E2EDA644
Level 25: 2D02A8EA 9B748C49
Level 26: 9D2895EF 6A2BEE59
Level 27: 1BB7262E 80989B57
Level 28: 79693C0B A82C5A23
Level 29: B98E773A D6E0D6AD
Level 30: A457FA67 BCD9C478
Level 31: 881976CC 20B658FF
Level 32: 0073F88A 0A4E81B6
Level 33: 792E7A0F F4BF8DDB
Level 34: 0965B686 64E170F2
Level 35: C70600E8 789A0DAC
Level 36: 0CF8B98B 706A26BE
Level 37: 2E7A201E 5EDBDEE3
Level 38: 9B169FF5 CBABA5A6
Level 39: 7928BBA3 C55BBEAB
Level 40: 155D7103 D66B8A15
Level 41: 7B9DFCEF 830C6BDA
Level 42: BA697C16 93D76910
Level 43: CCED8F7A 8EC0F43C
Level 44: 58EAABBC FC3CA9C2
Level 45: 710D8A2D 45E999F3
Level 46: 2EC0F0EC 6B1A061F
Level 47: E951E67F BFD89E41
Level 48: B743EDBF B82BB83A
Level 49: 4BF9418B EFC87C19
Level 50: CBEB73A3 90A08906
Level 51: 9818C0C6 E03F8431
Level 52: 8A448A37 583B581C
Level 53: 1855C5A3 70B67919
Level 54: 72898F14 3F2CD864
Level 55: 3E7B9D1E 5CE7F0DC
Level 56: B62795CF CEAE6A48
Level 57: 05858D31 D4449EFE
Level