Pony Fantasy VI Remake

You're gonna have to change the 'pointers' that basically do just that and 'point' to an address where the words are spelled out. So you'll have to find said pointers and re-point them to the new addresses where your expanded names are, which you should put in some free space in that same bank, since these pointers only read the middle and last byte of an address of C3.
Thanks to the disassembly you can search for these pointers much much easier.

For instance these ones (there will be more instances in various places):
(these are pointers)
C3/5C3A: 485C
C3/5C3C: 515C
C3/5C3E: 595C
C3/5C40: 635C
C3/5C42: 6B5C
C3/5C44: 725C
C3/5C46: 795C

(these are what they are pointing to)
C3/5C48: 0D7984ACA99EABAC00 (position of and word "Espers")
C3/5C51: 8D798C9AA0A29C00 (position of and word "Magic")
C3/5C59: 8D7A92B09D939E9CA100 (position of and word "SwdTech")
C3/5C63: 0D7B81A5A2ADB300 (position of and word "Blitz")
C3/5C6B: 8D7B8BA8AB9E00 (position of and word "Lore")
C3/5C72: 0D7C919AA09E00 (position of and word "Rage")
C3/5C79: 8D7C839AA79C9E00 (position of and word "Dance")