Don't want to worry about those annoying POW blocks? Well then, THIS is the code for you! Works online.
[POW Block Blocker - NoHack2Win - NTSC-US]
2834XXXX YYYYZZZZ <- To Activate
047D9828 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047D9828 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - PAL]
2834XXXX YYYYZZZZ <- To Activate
047B1DD4 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047B1DD4 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - NTSC-JP]
2834XXXX YYYYZZZZ <- To Activate
047B1440 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047B1440 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - NTSC-K]
2833XXXX YYYYZZZZ <- To Activate
047A0194 60000000
E0000000 00000000
2833XXXX YYYYZZZZ <- To Deactivate
047A0194 90030000
E0000000 80008000
Note: This was the first code I ever created. At this stage, it's useless now because permanent invincibility hacks exist, but who knows, maybe someone will have a use for it... =P
[POW Block Blocker - NoHack2Win - NTSC-US]
2834XXXX YYYYZZZZ <- To Activate
047D9828 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047D9828 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - PAL]
2834XXXX YYYYZZZZ <- To Activate
047B1DD4 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047B1DD4 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - NTSC-JP]
2834XXXX YYYYZZZZ <- To Activate
047B1440 60000000
E0000000 00000000
2834XXXX YYYYZZZZ <- To Deactivate
047B1440 90030000
E0000000 80008000
[POW Block Blocker - NoHack2Win - NTSC-K]
2833XXXX YYYYZZZZ <- To Activate
047A0194 60000000
E0000000 00000000
2833XXXX YYYYZZZZ <- To Deactivate
047A0194 90030000
E0000000 80008000
Note: This was the first code I ever created. At this stage, it's useless now because permanent invincibility hacks exist, but who knows, maybe someone will have a use for it... =P