Hacking Tool to untrim ROM?

[blazingwolf]

I keep getting a black screen randomly when booting up Pokemon X, having me restart over 3 times, I just read online trimming the rom causes this, is this true, and if so, how can I untrim it is there a tool I can use, will I lose my save?

 

[blazingwolf]

I used 3DS tool to untrim but now I have to start all over again...sigh.

 

[Xenon Hacks]

BACKUPS BACKUPS BACKUPS!
You're gonna have to rip the rom from your cart again

 

[VerseHell]

Romtool if you know how to use the cmd line, or 3ds file explorer.

 

[X_Frost]

I was under the impression that Card2 games shouldn't be trimmed as that removes the part where game saves go. Correct me if I'm wrong.