Pony Fantasy VI Remake

Yes, it'll work, but a simpler way would be to just change the pointer of Pep Up to point to the Valiant Knife function, sans the Ignore Defense-setting code, ie. to C2/3F8E.

The pointer for Pep Up is here:

Code:

C2/3E0D: B8 3C ($20)

Change that B8 3C to 8E 3F and it should work.

EDIT: if you want to replace special effects, you can either change the pointer to a new location with your custom code, or you can overwrite the old code that is pointed to. In the latter case, appropriating an unused function (like Pep Up) is fine as long as the code is shorter or same length.

If you want to ADD special effects, find an entry that is unused (points to RTS) in BOTH pointer tables (once-per-strike and once-per-target) and point that to wherever you write your new code.