Anyone good with old Wii Gecko codes?

[NekoSabrina]

I was recently going through some old Gecko codes and a couple of them have proven...interesting. The codes in question are for SD Gundam G Generation Wars (game ID R77JAF), and while they do work, they seem bloated or poorly formatted. Here's an example piece:

C23459B8 00000004
3B800000 7C00EA14
3B9C0001 2C1C00XX
41820008 4BFFFFF0
3B800000 ?0000000
E0000000 80008000

This code is a Character EXP modification code (if xx = 02, then EXP x2, if 64 then EXP x100) and while it does work, it's been a little touchy at times. The ? is a bit of an oddball, in this code that digit is a 0, in a similar code it's a 6 (which I'm thinking it should be). Based on research I've been doing, it's a roughly put together code given its structure. Does anyone know how to clean this code up to make it less bloated and more reliable? For point of comparison, here's the same code for the sequel game SD Gundam G Generation World (SDJJAF):

C217096C 00000002
80930048 1C8400XX
60000000 00000000

I know it's not exactly a fair comparison because it's two different games, but this code does look much neater and I've had no issues with this one.

Edited July 9 by NekoSabrina