I've learned that the
"Invalid Instruction width 0 in Atmosphere cheat" error is caused by the group codes for the item and movement and such codes, as seen below.
Code:
[---XXXX XXXXX---]
00000000 0000000 0000000
As for the freezing on launch, it has to do with the amount and/or order of cheats in the file. I removed all the cheats except for 60 FPS, Shiny, 2X Player Speed and walk Thorugh Walls, and the game launched fine.
So I'd go through and keep only the codes you're guaranteed to use and none else. Once you've done that and got it working, then you can add more cheats in a few at a time, until it won't load.