Pokemon Black ROM freezing!

[Sapphowako]

I did an extensive edit of my pokemon black rom, under the working title Pokemon Musketeer Version. When I go to open the gift to get my starters, the game freezes. The game also did that before I changed the PvP sprites for the Wonder Launcher to Admins of Team Plasma, when I went to battle Bianca the first time. Any ideas as to how to fix it?

[Kaphotics]

>extensive edit

yeah, you broke something. With what you've told us so far it's unclear what exactly you broke. What exactly did you edit? (narc)

[Sapphowako]

uhh, I just changed some trainer sprites, i think it was narc file a072. after that I used a tool that edited my rom and changed the images of two people to test the new trainers, which i did with a program that edited the rom.

EDIT: I think it might be because i opened a save state, and since the data from the game was different it froze.