Can someone explain what byte I should use when searching for values with wiird? Do you reay just guess which one to use?
Almost every value on the Wii is stored as a 32-bit value (VC mostly has smaller bitsizes), so just try 32-bits first.
If that doesn't work you can first try the other memory region, then you could try the other bit sizes.
But you can also keep in mind that an 8-bit value can store the numbers 0 to 255 (0xFF), so if a value will never be higher than 255 it will always fit in 8 bits.