By modifying an already present code in the database I've got the 'unlock classes' for the extra GP
801E64FC=0005
800A0B30=0005

I've simply take the codes 'load of credits' for normal mode and extra mode, subaxtract between the two addresses then the add the difference (2DE4) to the other
value is 0005 instead 0004 because extra GP have 6 classes
this is very useful code, full unlock the shop in the process and in conjunction
with the credit code is possible to archieve ''everything now'' mode only available in the Euro version after beating it

801E64FC=0005
800A0B30=0005
I've simply take the codes 'load of credits' for normal mode and extra mode, subaxtract between the two addresses then the add the difference (2DE4) to the other
value is 0005 instead 0004 because extra GP have 6 classes
this is very useful code, full unlock the shop in the process and in conjunction
with the credit code is possible to archieve ''everything now'' mode only available in the Euro version after beating it