I've been working and checking the Onett files... and I saw that apparently the blue background is an impediment to swap another stage background to Onett.
So, I was wondering... Is there a way to get rid of that background? or the game would crash?
Also, apparently that background is polygon 198 of model 0... I tried deleting it with brawlbox and at first glance the polygon is gone, but as soon as you save the pac it is there again.
Remove polygon 198 (with hexing), and then replace the Cloud model with whatever backdrop you want.
Already did that but it had some kind of glitches...
That's why I was wondering if there was another way... then again... it could be my SD card... it failed not too much ago...
I'll check, and thanks for the reply.
EDIT: Yeah, it was the sd card, tested it with another card and it turned out the file worked fine all the time.