Changing the Command name

The relics don't change the command names. They replace one command for another command when the relic is equipped. Specifically, they are:

Code:

(Data - commands that can be replaced with other commands thanks to Relics)
C2/5452: 05   (Steal)
C2/5453: 0F   (Slot)
C2/5454: 0D   (Sketch)
C2/5455: 02   (Magic)
C2/5456: 00   (Fight)

(Data - commands that can replace above commands due to Relics)
C2/5457: 06   (Capture)
C2/5458: 18   (GP Rain)
C2/5459: 0E   (Control)
C2/545A: 17   (X-Magic)
C2/545B: 16   (Jump)

For the purpose of changing only the name of the command based on relics, you need to hack where the command name is loaded and add conditional cases to load alternative names for the command. It probably is somewhere in the C3 bank. It may be difficult if you don't know ASM hacking.